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| 1 | EEG-correlates of trait anxiety in the stop-signal paradigm显示文摘 | Savostyanov A.N Tsai A.C Liou M Levin E.A Lee J.D Yurganov A.V & Knyazev G.G | | 0，，02： | 1 |
| 2 | Carbon monoxide and total ozone in Arctic and Antarctic regions:seasonal variations,long-term trends and relationships显示文摘 | Yurganov L.N Dzhola A.V Grechko E.I | | 0，，： | 1 |
| 3 | Increased northern hemispheric carbon monoxide burden in the troposphere in 2002 and 2003 detected from the ground and from space显示文摘 | Yurganov L N Duchatelet P Dzhola A V | 2005 | Atmospheric Chemistry and Physics2005，5，： | 1 |
| 4 | Methane increase over the Barents and Kara seas after the autumn pycnocline breakdown: satellite observations显示文摘Seven operative thermal infrared(TIR)spectrometers launched at sun-synchronous polar orbits supply huge amounts of information about Arctic methane(CH4)year-round,day and night.TIR data are unique for estimating CH4 emissions from a warming Arctic,both terrestrial and marine.This report is based on publicly available CH4 concentrations retrieved by NOAA and NASA from spectra of TIR radiation delivered by EU IASI and US AIRS sounders.Data were filtered for high thermal contrast in the troposphere.Validation versus aircraft measurements at three US continental sites reveal a reduced,but still significant sensitivity to CH4 anomalies in the troposphere below 4 km of altitude.The focus area is the Barents and Kara seas(BKS).BKS is impacted with warm Atlantic water and mostly free of sea ice.It is a shelf area with vast deposits of oil and natural gas(~90%CH4),as well as methane hydrates and submarine permafrost.Although in summer AIRS and IASI observe no significant difference in CH4 between BKS and N.Atlantic,a strong,monthly positive CH4 spatial anomaly of up to 30 ppb occurs during late autumn–winter.One of explanations of this increase is a fall/winter pycnocline breakdown after a period of blocked mixing caused by a stable density seawater stratification in summer:enhanced mixing lets CH4 to reach the sea surface and atmosphere. | Leonid YURGANOV Frank MULLER-KARGER Ira LEIFER | 2019 | Advances in Polar Science2019，30，4： | 0 |
| 5 | Ocean stratification and sea-ice cover in Barents and Kara seas modulate sea-air methane flux:satellite data显示文摘The diverse range of mechanisms driving the Arctic amplification and global climate are not completely understood and,in particular,the role of the greenhouse gas methane(CH4)in the Arctic warming remains unclear.Strong sources of methane at the ocean seabed in the Barents Sea and other polar regions are well documented.Nevertheless,some of those publications suggest that negligible amounts of methane fluxed from the seabed enter the atmosphere,with roughly 90%of the methane consumed by bacteria.Most in situ observations are taken during summer,which is favorable for collecting data but also characterized by a stratified water column.We present perennial observations of three Thermal IR space-borne spectrometers in the Arctic between 2002 and 2020.According to estimates derived from the data synthesis ECCO(Estimating the Circulation and Climate of the Ocean),in the ice-free Barents Sea the stratification in winter weakens after the summer strong stability.The convection,storms,and turbulent diffusion mix the full-depth water column.CH4 excess over a control area in North Atlantic,measured by three sounders,and the oceanic Mixed Layer Depth(MLD)both maximize in winter.A significant seasonal increase of sea-air exchange in ice-free seas is assumed.The amplitude of the seasonal methane cycle for the Kara Sea significantly increased since the beginning of the century.This may be explained by a decline of ice concentration there.The annual CH4 emission from the Arctic seas is estimated as 2/3 of land emission.The Barents/Kara seas contribute between 1/3 and 1/2 into the Arctic seas annual emission. | Leonid YURGANOV Dustin CARROLL Andrey PNYUSHKOV Igor POLYAKOV Hong ZHANG | 2021 | Advances in Polar Science2021，32，2： | 0 |
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