Results 51 to 60 of about 7,934 (246)

Arctic tropospheric warming amplification? [PDF]

Nature, 2008
Relative rates of temperature change between the troposphere and surface, and the mechanisms that produce these changes, have long been a contentious issue. Graversen et al., predicated upon the ERA-40 reanalysis, report polar tropospheric amplification of surface warming and attempt to explain this finding dynamically.
openaire   +2 more sources

Arctic amplification: does it impact the polar jet stream?

Tellus: Series A, Dynamic Meteorology and Oceanography, 2016
It has been hypothesised that the Arctic amplification of temperature changes causes a decrease in the northward temperature gradient in the troposphere, thereby enhancing the oscillation of planetary waves leading to extreme weather in mid-latitudes. To
Valentin P. Meleshko, Ola M. Johannessen, Andrey V. Baidin, Tatiana V. Pavlova, Veronika A. Govorkova   +4 more
doaj   +1 more source

A Quantitative Analysis of the Source of Inter‐Model Spread in Arctic Surface Warming Response to Increased CO2 Concentration

Geophysical Research Letters, 2022
This study exams the main sources of inter‐model spread in Arctic amplification of surface warming simulated in the abrupt‐4 × CO2 experiments of 18 CMIP6 models. It is found that the same seasonal energy transfer mechanism, namely that the part of extra
Xiaoming Hu, Yanchi Liu, Yunqi Kong, Qinghua Yang   +3 more
doaj   +1 more source

Arctic Ocean Amplification in a warming climate in CMIP6 models

Science Advances, 2022
Arctic near-surface air temperature warms much faster than the global average, a phenomenon known as Arctic Amplification. The change of the underlying Arctic Ocean could influence climate through its interaction with sea ice, atmosphere, and the global ocean, but it is less well understood. Here, we show that the upper 2000 m of the Arctic Ocean warms
Qi Shu, Qiang Wang, Marius Årthun, Shizhu Wang, Zhenya Song, Min Zhang, Fangli Qiao   +6 more
openaire   +4 more sources

Unnatural Trend Detection of Arctic Amplification

, 2021
Abstract The driving mechanism of Arctic amplification (AA) is so complex that no consistent and definitive conclusion has been formed yet. In particular, the natural or unnatural cause of AA has not yet been investigated and distinguished in clarity and depth.
Yu Wang, Pengcheng Yan, Taichen Feng, Fei Ji, Shankai Tang, Guolin Feng   +5 more
openaire   +1 more source

Structural instability impairs function of the UDP‐xylose synthase 1 Ile181Asn variant associated with short‐stature genetic syndrome in humans

FEBS Letters, EarlyView.
The Ile181Asn variant of human UDP‐xylose synthase (hUXS1), associated with a short‐stature genetic syndrome, has previously been reported as inactive. Our findings demonstrate that Ile181Asn‐hUXS1 retains catalytic activity similar to the wild‐type but exhibits reduced stability, a looser oligomeric state, and an increased tendency to precipitate ...
Tuo Li, Pedro A. Sánchez‐Murcia, Bernd Nidetzky   +2 more
wiley   +1 more source

The role of sea ice in present and future Arctic amplification

Communications Earth & Environment
The importance of sea-ice loss on the Arctic amplification of near-surface warming remains contentious, as Arctic amplification emerges even in model experiments with disabled surface-albedo feedback.
Eui-Seok Chung, Seong-Joong Kim, Kyung-Ja Ha, Malte F. Stuecker, Sun-Seon Lee, Joo-Hong Kim, Sang-Yoon Jun, Tamás Bódai   +7 more
doaj   +1 more source

Remote sensing, snow modelling, survey data and Indigenous Knowledge show how snow and sea-ice conditions affect Peary caribou (Rangifer tarandus pearyi) distribution and inter-island and island–mainland movements

Polar Research, 2022
Accelerated warming of the Arctic has reduced sea ice and has increased the occurrence of winter extreme events like rain-on-snow and storms that impact snow-cover densification, affecting Peary caribou (Rangifer tarandus pearyi) seasonal movements and ...
Coralie Gautier, Alexandre Langlois, Vincent Sasseville, Erin Neave, Cheryl Ann Johnson   +4 more
doaj   +1 more source

The (Glg)ABCs of cyanobacteria: modelling of glycogen synthesis and functional divergence of glycogen synthases in Synechocystis sp. PCC 6803

FEBS Letters, EarlyView.
We reconstituted Synechocystis glycogen synthesis in vitro from purified enzymes and showed that two GlgA isoenzymes produce glycogen with different architectures: GlgA1 yields denser, highly branched glycogen, whereas GlgA2 synthesizes longer, less‐branched chains.
Kenric Lee, Dimitrios Bekiari, Sofia Doello, Karl Forchhammer   +3 more
wiley   +1 more source

Mid-latitude clouds contribute to Arctic amplification via interactions with other climate feedbacks

Environmental Research: Climate
Traditional feedback analyses, which assume that individual climate feedback mechanisms act independently and add linearly, suggest that clouds do not contribute to Arctic amplification.
David B Bonan, Jennifer E Kay, Nicole Feldl, Mark D Zelinka   +3 more
doaj   +1 more source