Misplaced Pages

Carl-Gustaf Rossby

Article snapshot taken from Wikipedia with creative commons attribution-sharealike license. Give it a read and then ask your questions in the chat. We can research this topic together.

Carl-Gustaf Arvid Rossby ( Swedish pronunciation: [kɑːɭ ˈɡɵ̂sːtav ˈǎrːvɪd ˈrɔ̌sːbʏ] 28 December 1898 – 19 August 1957) was a Swedish -born American meteorologist who first explained the large-scale motions of the atmosphere in terms of fluid mechanics . He identified and characterized both the jet stream and the long waves in the westerlies that were later named Rossby waves .

#805194

68-607: Carl-Gustaf Rossby was born in Stockholm, Sweden. He was the first of five children born to Arvid and Alma Charlotta (Marelius) Rossby. He attended Stockholm University , where he developed his first interest in mathematical physics. Rossby came into meteorology and oceanography while studying geophysics under Vilhelm Bjerknes at the Geophysical Institute, University of Bergen in Bergen , Norway, during 1919, where Bjerknes' group

136-416: A greenhouse gas . Carbon dioxide is soluble in water and is found in groundwater , lakes , ice caps , and seawater . It is a trace gas in Earth's atmosphere at 421  parts per million (ppm) , or about 0.042% (as of May 2022) having risen from pre-industrial levels of 280 ppm or about 0.028%. Burning fossil fuels is the main cause of these increased CO 2 concentrations, which are

204-463: A chair in the mathematics department in 1889, making her the third female professor in Europe. In 1904 the college became an official degree-granting institution. In 1960, the college was granted university status, becoming Sweden's fourth state university. The university premises were situated in central Stockholm at Observatorielunden but increased enrollment resulted in a lack of space, which required

272-516: A decline in basic activity level and information usage at 1000 ppm, when compared to 500 ppm. However a review of the literature found that a reliable subset of studies on the phenomenon of carbon dioxide induced cognitive impairment to only show a small effect on high-level decision making (for concentrations below 5000 ppm). Most of the studies were confounded by inadequate study designs, environmental comfort, uncertainties in exposure doses and differing cognitive assessments used. Similarly

340-446: A fixed structure. However, in a Coulomb explosion imaging experiment, an instantaneous image of the molecular structure can be deduced. Such an experiment has been performed for carbon dioxide. The result of this experiment, and the conclusion of theoretical calculations based on an ab initio potential energy surface of the molecule, is that none of the molecules in the gas phase are ever exactly linear. This counter-intuitive result

408-802: A full study programme. Stockholm university offers 4 Bachelor Programmes taught in English, which are the Bachelor´s Programme in Business, Ethics and Sustainability; Bachelor Programme in Latin America Studies; Bachelor´s Programme in International Business and Politics and the Bachelor´s Programme in Earth Science, Distance Learning. Besides the programmes themselves, the university also offers opportunities for foreign exchange studies during

476-611: A glass state similar to other members of its elemental family, like silicon dioxide (silica glass) and germanium dioxide . Unlike silica and germania glasses, however, carbonia glass is not stable at normal pressures and reverts to gas when pressure is released. At temperatures and pressures above the critical point, carbon dioxide behaves as a supercritical fluid known as supercritical carbon dioxide . Table of thermal and physical properties of saturated liquid carbon dioxide: Table of thermal and physical properties of carbon dioxide (CO 2 ) at atmospheric pressure: Carbon dioxide

544-491: A mature forest will produce as much CO 2 from respiration and decomposition of dead specimens (e.g., fallen branches) as is used in photosynthesis in growing plants. Contrary to the long-standing view that they are carbon neutral, mature forests can continue to accumulate carbon and remain valuable carbon sinks , helping to maintain the carbon balance of Earth's atmosphere. Additionally, and crucially to life on earth, photosynthesis by phytoplankton consumes dissolved CO 2 in

612-428: A much larger denominator and a much smaller value than the true K a1 . The bicarbonate ion is an amphoteric species that can act as an acid or as a base, depending on pH of the solution. At high pH, it dissociates significantly into the carbonate ion ( CO 2− 3 ): In organisms, carbonic acid production is catalysed by the enzyme known as carbonic anhydrase . In addition to altering its acidity,

680-502: A number of centers and institutes with a separate governing board, but that organisationally belong to a department. Stockholm University offers courses at both undergraduate and advanced level. There are 190 study programmes in total, including 75 master's programmes taught in English, and 1,700 courses to choose from within human science and science. Students can choose between studying one or more free-standing courses, that each may last between five weeks and one semester, or apply for

748-413: A research associate at Woods Hole Oceanographic Institution . His interests during this time ranged over atmospheric thermodynamics , mixing and turbulence , and the interaction between oceans and the atmosphere . On 9 January 1939 he became an American citizen and in that same year, assistant director of research at the U.S. Weather Bureau. His appointment as chair of the department of meteorology at

SECTION 10

#1732845317806

816-416: A study on the effects of the concentration of CO 2 in motorcycle helmets has been criticized for having dubious methodology in not noting the self-reports of motorcycle riders and taking measurements using mannequins. Further when normal motorcycle conditions were achieved (such as highway or city speeds) or the visor was raised the concentration of CO 2 declined to safe levels (0.2%). Poor ventilation

884-467: A typical single C–O bond, and shorter than most other C–O multiply bonded functional groups such as carbonyls . Since it is centrosymmetric, the molecule has no electric dipole moment . As a linear triatomic molecule, CO 2 has four vibrational modes as shown in the diagram. In the symmetric and the antisymmetric stretching modes, the atoms move along the axis of the molecule. There are two bending modes, which are degenerate , meaning that they have

952-469: Is Emiliania huxleyi whose calcite scales have formed the basis of many sedimentary rocks such as limestone , where what was previously atmospheric carbon can remain fixed for geological timescales. Plants can grow as much as 50% faster in concentrations of 1,000 ppm CO 2 when compared with ambient conditions, though this assumes no change in climate and no limitation on other nutrients. Elevated CO 2 levels cause increased growth reflected in

1020-419: Is 304.128(15) K (30.978(15) °C) at 7.3773(30) MPa (72.808(30) atm). Another form of solid carbon dioxide observed at high pressure is an amorphous glass-like solid. This form of glass, called carbonia , is produced by supercooling heated CO 2 at extreme pressures (40–48  GPa , or about 400,000 atmospheres) in a diamond anvil . This discovery confirmed the theory that carbon dioxide could exist in

1088-566: Is 53% more dense than dry air, but is long lived and thoroughly mixes in the atmosphere. About half of excess CO 2 emissions to the atmosphere are absorbed by land and ocean carbon sinks . These sinks can become saturated and are volatile, as decay and wildfires result in the CO 2 being released back into the atmosphere. CO 2 is eventually sequestered (stored for the long term) in rocks and organic deposits like coal , petroleum and natural gas . Nearly all CO2 produced by humans goes into

1156-720: Is a public research university in Stockholm , Sweden , founded as a college in 1878, with university status since 1960. With over 33,000 students at four different faculties: law, humanities, social sciences, and natural sciences, it is one of the largest universities in Scandinavia . Stockholm University was granted university status in 1960, making it the fourth oldest Swedish university . As with other public universities in Sweden, Stockholm University's mission includes teaching and research anchored in society at large. The initiative for

1224-415: Is an end product of cellular respiration in organisms that obtain energy by breaking down sugars, fats and amino acids with oxygen as part of their metabolism . This includes all plants, algae and animals and aerobic fungi and bacteria. In vertebrates , the carbon dioxide travels in the blood from the body's tissues to the skin (e.g., amphibians ) or the gills (e.g., fish ), from where it dissolves in

1292-402: Is commercially used in its solid form, commonly known as " dry ice ". The solid-to-gas phase transition occurs at 194.7 Kelvin and is called sublimation . The symmetry of a carbon dioxide molecule is linear and centrosymmetric at its equilibrium geometry. The length of the carbon–oxygen bond in carbon dioxide is 116.3  pm , noticeably shorter than the roughly 140 pm length of

1360-451: Is consumed and CO 2 is released as waste by all aerobic organisms when they metabolize organic compounds to produce energy by respiration . CO 2 is released from organic materials when they decay or combust, such as in forest fires. When carbon dioxide dissolves in water, it forms carbonate and mainly bicarbonate ( HCO − 3 ), which causes ocean acidification as atmospheric CO 2 levels increase. Carbon dioxide

1428-436: Is made up of molecules that each have one carbon atom covalently double bonded to two oxygen atoms. It is found in the gas state at room temperature and at normally-encountered concentrations it is odorless. As the source of carbon in the carbon cycle , atmospheric CO 2 is the primary carbon source for life on Earth. In the air, carbon dioxide is transparent to visible light but absorbs infrared radiation , acting as

SECTION 20

#1732845317806

1496-632: Is one of the main causes of excessive CO 2 concentrations in closed spaces, leading to poor indoor air quality . Carbon dioxide differential above outdoor concentrations at steady state conditions (when the occupancy and ventilation system operation are sufficiently long that CO 2 concentration has stabilized) are sometimes used to estimate ventilation rates per person. Higher CO 2 concentrations are associated with occupant health, comfort and performance degradation. ASHRAE Standard 62.1–2007 ventilation rates may result in indoor concentrations up to 2,100 ppm above ambient outdoor conditions. Thus if

1564-410: Is ordinarily a difficult and slow reaction: The redox potential for this reaction near pH 7 is about −0.53 V versus the standard hydrogen electrode . The nickel-containing enzyme carbon monoxide dehydrogenase catalyses this process. Photoautotrophs (i.e. plants and cyanobacteria ) use the energy contained in sunlight to photosynthesize simple sugars from CO 2 absorbed from

1632-405: Is produced as a by-product. Ribulose-1,5-bisphosphate carboxylase oxygenase , commonly abbreviated to RuBisCO, is the enzyme involved in the first major step of carbon fixation, the production of two molecules of 3-phosphoglycerate from CO 2 and ribulose bisphosphate , as shown in the diagram at left. RuBisCO is thought to be the single most abundant protein on Earth. Phototrophs use

1700-472: Is the true first acid dissociation constant, defined as where the denominator includes only covalently bound H 2 CO 3 and does not include hydrated CO 2 (aq). The much smaller and often-quoted value near 4.16 × 10 (or pK a1 = 6.38) is an apparent value calculated on the (incorrect) assumption that all dissolved CO 2 is present as carbonic acid, so that Since most of the dissolved CO 2 remains as CO 2 molecules, K a1 (apparent) has

1768-419: Is trivially due to the fact that the nuclear motion volume element vanishes for linear geometries. This is so for all molecules except diatomic molecules . Carbon dioxide is soluble in water, in which it reversibly forms H 2 CO 3 (carbonic acid), which is a weak acid , because its ionization in water is incomplete. The hydration equilibrium constant of carbonic acid is, at 25 °C: Hence,

1836-465: Is used in CO 2 scrubbers and has been suggested as a possible starting point for carbon capture and storage by amine gas treating . Only very strong nucleophiles, like the carbanions provided by Grignard reagents and organolithium compounds react with CO 2 to give carboxylates : In metal carbon dioxide complexes , CO 2 serves as a ligand , which can facilitate the conversion of CO 2 to other chemicals. The reduction of CO 2 to CO

1904-644: The Aula Magna (auditorium). Within Frescati, the areas Albano, the Bergius Botanical Garden , Frescati Backe, Frescati Hage, Kräftriket, Lilla Frescati and Sveaplan are located. The names of many of these areas have a history dating back to the late 1700s. After Gustav III's trip to Italy in 1783–84, several places at Brunnsviken were given Italian names. Stockholm University has another campus in Kista , which houses

1972-657: The Swedish Meteorological and Hydrological Institute (SMHI) in Stockholm, dividing his time between there, the University of Chicago and with the Woods Hole Oceanographic Institution . After the war he visited an old friend Professor Hans Ertel in Berlin. Their cooperation led to the mathematical formulation of Rossby waves . Between 1954 and his death in Stockholm in 1957, he championed and developed

2040-541: The Swedish Meteorological and Hydrological Institute ) where he served as a meteorologist on a variety of oceanographic expeditions. While ashore between expeditions, he studied mathematical physics at the University of Stockholm ( Filosofie Licentiat , 1925). In 1925 Rossby was granted a fellowship from the Sweden-America Foundation "to study the application of the polar front theory to American weather". In

2108-628: The U.S. Weather Bureau in Washington, DC , he combined theoretical work on atmospheric turbulence with the establishment of the first weather service for civil aviation . In 1928 he became associate professor in the Aeronautics Department of the Massachusetts Institute of Technology (MIT). Shortly after this MIT launched the first department of meteorology in the US. In 1931 he also became

Carl-Gustaf Rossby - Misplaced Pages Continue

2176-590: The University of Chicago in 1940 began the period in which he turned his attention to large-scale atmospheric motions. He identified and characterized both the jet stream and Rossby waves in the atmosphere. During World War II , Rossby organized the training of military meteorologists, recruiting many of them to his Chicago department in the post-war years where he began adapting his mathematical description of atmospheric dynamics to weather forecasting by electronic computer, having started this activity in Sweden using BESK . In 1947 he became founding director of

2244-575: The Department of computer and systems sciences. There are many ways to get to Stockholm University. The main campus Frescati is located near the underground railway station Universitetet metro station , on the red line of the Stockholm Metro . The commuter train line Roslagsbanan also stop close to the main campus, at Universitetet railway station . SL buses 50, 540, 608, 624C, 628C, 639, 670 676, 680, 690, 691, 696 and 699 can also be used to get to

2312-557: The Stockholm University College was adopted in May 1877, and in the autumn semester of the following year, actual operations began. In 1878, the university college Stockholms högskola started its operations with a series of lectures on natural sciences, open to curious citizens (a tradition still upheld by yearly publicly open lectures). Notable in the university's early history is the appointment of Sofia Kovalevskaya to hold

2380-622: The Teacher's College's Student Union is however not entirely safe, as Stockholm University's Student Union has declared it will begin talks with the Teacher's College's Student Union on transferring its members to it, as it already has a teacher's division. In contrast to common belief, DISK is not an abbreviation. In the Academic Ranking of World Universities 2020, an annual publication of university rankings by Shanghai Ranking Consultancy/ Academic Ranking of World Universities , Stockholm University

2448-439: The air and water: Carbon dioxide is colorless. At low concentrations, the gas is odorless; however, at sufficiently high concentrations, it has a sharp, acidic odor. At standard temperature and pressure , the density of carbon dioxide is around 1.98 kg/m , about 1.53 times that of air . Carbon dioxide has no liquid state at pressures below 0.51795(10) MPa (5.11177(99) atm ). At a pressure of 1 atm (0.101325 MPa),

2516-430: The atmosphere. Less than 1% of CO2 produced annually is put to commercial use, mostly in the fertilizer industry and in the oil and gas industry for enhanced oil recovery . Other commercial applications include food and beverage production, metal fabrication, cooling, fire suppression and stimulating plant growth in greenhouses. Carbon dioxide cannot be liquefied at atmospheric pressure. Low-temperature carbon dioxide

2584-402: The campus. The Computer Science campus, Kista, also is close to an underground station called Kista . It is also located close to the pendeltåg station Helenelund , only one or two stops (depending on bus line) from the bus station Torsnäsgatan located next to the campus area. Carbon dioxide Carbon dioxide is a chemical compound with the chemical formula CO 2 . It

2652-404: The capacity to accommodate groups of up to 25 people and the staff consists of 2–5 people. Tovetorp Zoological Research Station belongs to the Department of Zoology, and is located about 95 km southwest of Stockholm. It conducts research and training activities in ecology and ethology. Every year Tovetorp is visited by up to 600 students who live and study between 2–10 days on the station. On

2720-862: The condition. There are few studies of the health effects of long-term continuous CO 2 exposure on humans and animals at levels below 1%. Occupational CO 2 exposure limits have been set in the United States at 0.5% (5000 ppm) for an eight-hour period. At this CO 2 concentration, International Space Station crew experienced headaches, lethargy, mental slowness, emotional irritation, and sleep disruption. Studies in animals at 0.5% CO 2 have demonstrated kidney calcification and bone loss after eight weeks of exposure. A study of humans exposed in 2.5 hour sessions demonstrated significant negative effects on cognitive abilities at concentrations as low as 0.1% (1000   ppm) CO 2 likely due to CO 2 induced increases in cerebral blood flow. Another study observed

2788-510: The degenerate pair of bending modes at 667 cm (wavelength 15.0 μm). The symmetric stretching mode does not create an electric dipole so is not observed in IR spectroscopy, but it is detected in Raman spectroscopy at 1388 cm (wavelength 7.20 μm), with a Fermi resonance doublet at 1285 cm . In the gas phase, carbon dioxide molecules undergo significant vibrational motions and do not keep

Carl-Gustaf Rossby - Misplaced Pages Continue

2856-566: The dispersing effects of wind, it can collect in sheltered/pocketed locations below average ground level, causing animals located therein to be suffocated. Carrion feeders attracted to the carcasses are then also killed. Children have been killed in the same way near the city of Goma by CO 2 emissions from the nearby volcano Mount Nyiragongo . The Swahili term for this phenomenon is mazuku . Adaptation to increased concentrations of CO 2 occurs in humans, including modified breathing and kidney bicarbonate production, in order to balance

2924-541: The effects of blood acidification ( acidosis ). Several studies suggested that 2.0 percent inspired concentrations could be used for closed air spaces (e.g. a submarine ) since the adaptation is physiological and reversible, as deterioration in performance or in normal physical activity does not happen at this level of exposure for five days. Yet, other studies show a decrease in cognitive function even at much lower levels. Also, with ongoing respiratory acidosis , adaptation or compensatory mechanisms will be unable to reverse

2992-551: The electrical conductivity of fully deionized water without CO 2 saturation is comparably low in relation to these data. CO 2 is a potent electrophile having an electrophilic reactivity that is comparable to benzaldehyde or strongly electrophilic α,β-unsaturated carbonyl compounds . However, unlike electrophiles of similar reactivity, the reactions of nucleophiles with CO 2 are thermodynamically less favored and are often found to be highly reversible. The reversible reaction of carbon dioxide with amines to make carbamates

3060-518: The field of atmospheric chemistry . His contributions to meteorology were noted in the December 17, 1956, issue of Time magazine. His portrait appeared on the cover of that issue, the first meteorologist on the cover of a major magazine. During this period he considered the effect of carbon dioxide in the atmosphere and its potential warming effect. Stockholm University Stockholm University ( SU ) ( Swedish : Stockholms universitet )

3128-479: The formation of Stockholm University was taken by the Stockholm City Council. The process was completed after a decision in December 1865 regarding the establishment of a fund and a committee to "establish a higher education institution in the capital". The nine members of the committee were respected and prominent citizens whose work had helped the evolution of science and society. The next important step

3196-469: The gas deposits directly to a solid at temperatures below 194.6855(30) K (−78.4645(30) °C) and the solid sublimes directly to a gas above this temperature. In its solid state, carbon dioxide is commonly called dry ice . Liquid carbon dioxide forms only at pressures above 0.51795(10) MPa (5.11177(99) atm); the triple point of carbon dioxide is 216.592(3) K (−56.558(3) °C) at 0.51795(10) MPa (5.11177(99) atm) (see phase diagram). The critical point

3264-597: The harvestable yield of crops, with wheat, rice and soybean all showing increases in yield of 12–14% under elevated CO 2 in FACE experiments. Increased atmospheric CO 2 concentrations result in fewer stomata developing on plants which leads to reduced water usage and increased water-use efficiency . Studies using FACE have shown that CO 2 enrichment leads to decreased concentrations of micronutrients in crop plants. This may have knock-on effects on other parts of ecosystems as herbivores will need to eat more food to gain

3332-570: The impact of human interference is carried out. The field station was built in 1961 by Professor Lars Silén, Head of the Department of Zoology, and is now established as a renowned marine research center. Tarfala research station belongs to the Department of Physical Geography. The station is located 1135 meters above sea level in Tarfaladalen, on the east side of Kebnekaise in arctic / alpine surroundings and conducts glaciological, hydrological, meteorological and climatological research. The station has

3400-444: The majority of the carbon dioxide is not converted into carbonic acid, but remains as CO 2 molecules, not affecting the pH. The relative concentrations of CO 2 , H 2 CO 3 , and the deprotonated forms HCO − 3 ( bicarbonate ) and CO 2− 3 ( carbonate ) depend on the pH . As shown in a Bjerrum plot , in neutral or slightly alkaline water (pH > 6.5), the bicarbonate form predominates (>50%) becoming

3468-443: The most prevalent (>95%) at the pH of seawater. In very alkaline water (pH > 10.4), the predominant (>50%) form is carbonate. The oceans, being mildly alkaline with typical pH = 8.2–8.5, contain about 120 mg of bicarbonate per liter. Being diprotic , carbonic acid has two acid dissociation constants , the first one for the dissociation into the bicarbonate (also called hydrogen carbonate) ion ( HCO − 3 ): This

SECTION 50

#1732845317806

3536-495: The presence of carbon dioxide in water also affects its electrical properties. When carbon dioxide dissolves in desalinated water, the electrical conductivity increases significantly from below 1 μS/cm to nearly 30 μS/cm. When heated, the water begins to gradually lose the conductivity induced by the presence of C O 2 {\displaystyle \mathrm {CO_{2}} } , especially noticeable as temperatures exceed 30 °C. The temperature dependence of

3604-499: The presence of sufficient oxygen, manifesting as dizziness, headache, visual and hearing dysfunction, and unconsciousness within a few minutes to an hour. Concentrations of more than 10% may cause convulsions, coma, and death. CO 2 levels of more than 30% act rapidly leading to loss of consciousness in seconds. Because it is heavier than air, in locations where the gas seeps from the ground (due to sub-surface volcanic or geothermal activity) in relatively high concentrations, without

3672-508: The primary cause of climate change . Its concentration in Earth's pre-industrial atmosphere since late in the Precambrian was regulated by organisms and geological features. Plants , algae and cyanobacteria use energy from sunlight to synthesize carbohydrates from carbon dioxide and water in a process called photosynthesis , which produces oxygen as a waste product. In turn, oxygen

3740-496: The products of their photosynthesis as internal food sources and as raw material for the biosynthesis of more complex organic molecules, such as polysaccharides , nucleic acids , and proteins. These are used for their own growth, and also as the basis of the food chains and webs that feed other organisms, including animals such as ourselves. Some important phototrophs, the coccolithophores synthesise hard calcium carbonate scales. A globally significant species of coccolithophore

3808-619: The research side, over 20 people work today with different research projects. The number of employees are currently 6 people. Prior to 2008, Stockholm University had only one student union called Stockholm University Student Union (Stockholm universitets studentkår, SUS) . However, since 2008 the computer and system science students and the teacher students have their own, independent, student unions called DISK and "The Teacher's College's Student Union" (Lärarhögskolans studentkår) . The law students also have their own student union, as do journalism students ( Studentkåren vid JMK ). The future of

3876-494: The right, within the limits the government provides, to decide on many issues such as their internal organization, educational provision and the admission of students. Education and research at Stockholm University is carried out within the natural sciences and the humanities/social sciences. Within these fields, there are four faculties with 56 departments, institutes and centers within the humanities, law, natural sciences and social sciences. Research and training also takes place at

3944-420: The same amount of protein. The concentration of secondary metabolites such as phenylpropanoids and flavonoids can also be altered in plants exposed to high concentrations of CO 2 . Plants also emit CO 2 during respiration, and so the majority of plants and algae, which use C3 photosynthesis , are only net absorbers during the day. Though a growing forest will absorb many tons of CO 2 each year,

4012-411: The same frequency and same energy, because of the symmetry of the molecule. When a molecule touches a surface or touches another molecule, the two bending modes can differ in frequency because the interaction is different for the two modes. Some of the vibrational modes are observed in the infrared (IR) spectrum : the antisymmetric stretching mode at wavenumber 2349 cm (wavelength 4.25 μm) and

4080-473: The third year of a bachelor’s degree programme. The university has cooperative agreements with more than 100 universities worldwide. The university's researchers engage in governmental investigations, are active in the media, provide responses to proposed legislation and are included in several Nobel committees and international expert bodies. Stockholm University Marine Research center (SMF) provides "Askö Laboratory", where Research on ecosystems, ecology and

4148-472: The university campus to be shifted to a bigger facility. Since 1970 most of the university operations are located at the main campus at Frescati north of the city center, the former Experimentalfältet, previously used by the Royal Swedish Academy of Agriculture and Forestry . Stockholm University is a state agency and is governed by decisions taken by the government and parliament. The university has

SECTION 60

#1732845317806

4216-535: The upper ocean and thereby promotes the absorption of CO 2 from the atmosphere. Carbon dioxide content in fresh air (averaged between sea-level and 10 kPa level, i.e., about 30 km (19 mi) altitude) varies between 0.036% (360 ppm) and 0.041% (412 ppm), depending on the location. In humans, exposure to CO 2 at concentrations greater than 5% causes the development of hypercapnia and respiratory acidosis . Concentrations of 7% to 10% (70,000 to 100,000 ppm) may cause suffocation, even in

4284-546: The water, or to the lungs from where it is exhaled. During active photosynthesis, plants can absorb more carbon dioxide from the atmosphere than they release in respiration. Carbon fixation is a biochemical process by which atmospheric carbon dioxide is incorporated by plants, algae and cyanobacteria into energy-rich organic molecules such as glucose , thus creating their own food by photosynthesis. Photosynthesis uses carbon dioxide and water to produce sugars from which other organic compounds can be constructed, and oxygen

4352-599: The world in 2021, 4 in Sweden and 43 within Europe. In the CWTS Leiden Ranking 2022, Stockholm University was placed at 343 on the list of universities in the world. The main part of Stockholm University is in the Frescati area, which extends from the Bergius Botanical Garden in the north to Sveaplan in the south. It is located in the world's first national urban park and the area is characterized by nature, architecture and modern art, featuring such notable buildings as

4420-686: Was developing the groundbreaking concepts that became known as the Bergen School of Meteorology , including theory of the polar front . He also studied at the University of Leipzig and at the Lindenberg Observatory ( Meteorologisches Observatorium Lindenberg ) in Brandenburg where upper air measurements by kite and balloon were researched. In 1921 he returned to Stockholm to join the Meteorological and Hydrographic Office (which later became

4488-489: Was placed as the 69th overall best university worldwide. The Times Higher Education (THE) World University Rankings 2018 listed Stockholm University at position 134 on the list of the world's top universities. Times Higher Education World University Rankings are annual university rankings published by British Times Higher Education (THE) magazine. In the QS World University Rankings , Stockholm University

4556-790: Was ranked 148 overall in the world in 2021. Its subject rankings were: 23rd in Environmental Sciences, 37th in Sociology, 98th in Natural Sciences, 132nd in Arts & Humanities, 238th in Life Sciences & Medicine, 297th in Engineering and Technology, and 175th in Social Sciences and Management. In the U.S. News & World Report Rankings , Stockholm University was ranked 114 overall in

4624-534: Was taken in October 1869, when the Stockholm University College Association was established. Several members of the committee became members of the association – including Professor Pehr Henrik Malmsten. The association's mission was to establish a college in Stockholm and would "not be dissolved until the college came into being and its future could be considered secure." The memorandum of

#805194