Long-term trends and impacts of polar cold airmass in boreal summer
Bibliographic Data
| ID | 15545302 |
|---|---|
| Authors | Qian Liu (0000-0001-7603-2146, Southern Marine Science and Engineering Guangdong Laboratory (Zhuhai)), Guixing Chen (0000-0002-3112-0668, Southern Marine Science and Engineering Guangdong Laboratory (Zhuhai), corresponding author), Toshiki Iwasaki (0000-0003-2110-0687, Tohoku University) |
| Year | 2020 |
| Volume | 15 |
| Issue | 8 |
| Pages | 084042-084042 |
| Publication date | 2020-06-01 |
| Open Access | Yes |
| Type | ARTICLE |
| Venue | Environmental Research Letters (JOURNAL) |
| Journal identifiers | ISSN: 1748-9326 • E-ISSN: 1748-9326 |
| Publisher | IOP Publishing (PUBLISHER • GB) |
| DOI | 10.1088/1748-9326/ab986d |
| OpenAlex | W3033821210 |
| Language | EN |
| References cited | 35 |
The northern polar region possesses the most extensive cold airmass on Northern Hemisphere. The generation of this polar cold airmass and its outflow to lower latitudes play an important role in the climate system in terms of mass and heat exchanges. However, long-term changes in the polar cold airmass, especially in summer, and the climatic effects on mid-high latitudes are still unclear. Using an isentropic approach, we quantitatively show that the polar cold airmass amount has decreased rapidly since the 1980s, with a decade lagging behind the global warming. The equatorward flux of the cold airmass has also weakened, trapping the cold airmass in its source region. These profound changes in the cold airmass coincide with a period characterized by rapid surface warming and increasingly frequent heat waves in recent three decades over the mid-high latitude continents. Owing to regional differences in the cold airmass reduction, Europe and North America have experienced a surface warming faster than the Northern Hemisphere mean. Furthermore, such a long-term trend in the polar cold airmass can be attributed to Arctic sea ice loss and internal decadal variability of sea surface temperature in high-latitude oceans. Our results highlight that the isentropic analysis of cold airmass may serve a good detection of the climate change at polar region and mid-high latitudes
Atmospheric sciences · Climatology · Geography · Latitude · Middle latitudes · Northern Hemisphere · Polar · Arctic and Antarctic ice dynamics · Climate variability and models · Cryospheric studies and observations · Environmental Science · Geology
Recent Arctic amplification and extreme mid-latitude weather
Increased atmospheric vapor pressure deficit reduces global vegetation growth
The Arctic’s rapidly shrinking sea ice cover
Influence of extreme weather disasters on global crop production
The Hot Summer of 2010
Indicators and trends of polar cold airmass
Amplified summer warming in Europe–West Asia and Northeast Asia after the mid-1990s
| Highly cited | No |
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