Linking Arctic amplification and local feedbacks
نویسندگان
چکیده
منابع مشابه
Revisiting the evidence linking Arctic Amplification
Previous studies have suggested that Arctic Amplification has caused planetary-scale 3 waves to elongate meridionally and slowdown , resulting in more frequent blocking pat-4 terns and extreme weather. Here, trends in the meridional extent of atmospheric waves 5 over North America and the North Atlantic are investigated in three reanalyses, and it is 6 demonstrated that previously reported posi...
متن کاملEvidence linking Arctic amplification to extreme weather in mid-latitudes
[1] Arctic amplification (AA) – the observed enhanced warming in high northern latitudes relative to the northern hemisphere – is evident in lower-tropospheric temperatures and in 1000-to-500 hPa thicknesses. Daily fields of 500 hPa heights from the National Centers for Environmental Prediction Reanalysis are analyzed over N. America and the N. Atlantic to assess changes in north-south (Rossby)...
متن کاملArctic tropospheric warming amplification?
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. Here we show (1) that data from satellites and weather balloons indicate th...
متن کاملShifts in Arctic vegetation and associated feedbacks under climate change
Climate warming has led to changes in the composition, density and distribution of Arctic vegetation in recent decades1–4. These changes cause multiple opposing feedbacks between the biosphere and atmosphere5–9, the relative magnitudes of which will have globally significant consequences but are unknown at a pan-Arctic scale10. The precise nature of Arctic vegetation change under future warming...
متن کاملRevisiting the evidence linking Arctic amplification to extreme weather in midlatitudes
[1] Previous studies have suggested that Arctic amplification has caused planetary-scale waves to elongate meridionally and slow down, resulting in more frequent blocking patterns and extreme weather. Here trends in the meridional extent of atmospheric waves over North America and the North Atlantic are investigated in three reanalyses, and it is demonstrated that previously reported positive t...
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ژورنال
عنوان ژورنال: Eos, Transactions American Geophysical Union
سال: 2011
ISSN: 0096-3941
DOI: 10.1029/2011eo450015