Results 31 to 40 of about 4,444 (222)

Carbon emission from thermokarst lakes in NE European tundra [PDF]

open access: yesLimnology and Oceanography, 2020
AbstractEmission of greenhouse gases (GHGs) from inland waters is recognized as highly important and an understudied part of the terrestrial carbon (C) biogeochemical cycle. These emissions are still poorly quantified in subarctic regions that contain vast amounts of surface C in permafrost peatlands.
Zabelina, Svetlana   +11 more
openaire   +4 more sources

Simulating thermokarst lakes [PDF]

open access: yesEos, Transactions American Geophysical Union, 2012
Thermokarst lakes, which form from thawing permafrost, alter landscapes and hydrology and can release significant amounts of methane to the atmosphere. To learn more about the dynamics of thermokarst lakes, Kessler et al. created a three‐dimensional numerical model of these lakes that includes the surrounding topography.
openaire   +2 more sources

Geographic and seasonal variation of dissolved methane and aerobic methane oxidation in Alaskan lakes [PDF]

open access: yesBiogeosciences, 2015
Methanotrophic bacteria play an important role oxidizing a significant fraction of methane (CH4) produced in lakes. Aerobic CH4 oxidation depends mainly on lake CH4 and oxygen (O2) concentrations, in such a manner that higher MO rates are usually found ...
K. Martinez-Cruz   +3 more
doaj   +1 more source

Biogeography and environmental drivers of zooplankton communities in permafrost-affected lakes on the Qinghai-Tibet Plateau

open access: yesGlobal Ecology and Conservation, 2022
Global warming is accelerating permafrost thaw, forming new thermokarst lakes and substantially influencing the old ones. However, the biological communities in thermokarst lakes on the Qinghai-Tibet Plateau (QTP) are rarely studied.
Ze Ren   +5 more
doaj   +1 more source

The use of CORONA images in remote sensing of periglacial geomorphology: an illustration from the NE Siberian coast [PDF]

open access: yes, 2005
CORONA images have been used for the mapping of periglacial features on the Bykovsky Peninsula and adjacent Khorogor Valley in northeast Siberia. Features, mapped and analysed within a geographical information system, include thermokarst depressions ...
Grosse, Guido   +3 more
core   +1 more source

Thermokarst lakes increased atmospheric methane levels [PDF]

open access: yesEos, Transactions American Geophysical Union, 2012
Ice cores taken from Greenland indicate that during the last deglaciation, approximately 10,000 years ago, increases in temperature occurred at the same times as increases in atmospheric methane, a potent greenhouse gas. The source of the increase in atmospheric methane is still debated, but it has been suggested that thermokarst lakes, which form from
openaire   +1 more source

Effect of permafrost thaw on CO2 and CH4 exchange in a western Alaska peatland chronosequence [PDF]

open access: yes, 2014
Permafrost soils store over half of global soil carbon (C), and northern frozen peatlands store about 10% of global permafrost C. With thaw, inundation of high latitude lowland peatlands typically increases the surface-atmosphere flux of methane (CH4), a
Ewing, Stephanie A.   +8 more
core   +2 more sources

NATURAL FACTORS OF SMALL THERMOKARST LAKES DYNAMICS INSIDE THE BOVANENKOVO GAS FIELD

open access: yesИзвестия высших учебных заведений: Нефть и газ, 2015
This paper is dedicated to studying the causes of small thermokarst lakes number change in the territory of the Bovanenkovo gas field (Western Yamal) happened for the last 30 years.
G. S. Sannikov
doaj   +1 more source

Thermokarst lake changes over the past 40 years in the Qinghai–Tibet Plateau, China

open access: yesFrontiers in Environmental Science, 2022
A thermokarst lake is generally defined as a lake that occupies a closed basin and is created by the massive melting of ground ice in ice-rich permafrost regions, which has a great impact on regional hydro-ecological equilibrium and permafrost ...
Lan Li   +5 more
doaj   +1 more source

Comparison of hydrogeochemical characteristics of thermokarst lake water in the Qinghai–Tibet Plateau under active layer freeze–thaw conditions

open access: yesJournal of Water and Climate Change, 2022
With the gradual increase of global temperature, thermokarst lakes are widely developed and become major environmental disasters in the Tundra Plateau which have impacted the stability of the project such as the Qinghai–Tibetan highway.
Yahong Fang   +4 more
doaj   +1 more source

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