自然气候变化，9月14日。 北极正面临着从以冰冻圈为主的系统快速转变的高风险，促使研究人员敦促各国政府紧急减少温室气体排放，以避免失去其对全球气候系统的稳定作用。在当前高排放情景下，使用新的CMIP5 […]
September 22, at 15:30CEST/ 9:30AMEDT marks the autumn equinox, when the sun finally will go down on an Arctic summer like none before. Multiple heat waves broke records across the region, from Alaska to Greenland to Siberia, where the city of Verkhoyansk reached 100.4°F (38°C), the highest temperature ever recorded within the Arctic Circle. Svalbard […]
Journal of Geophysical Research, July 11 On the other side of the Arctic, an earlier study this summer found that winter storms and warm near‐surface Atlantic water appear directly responsible for winter sea ice loss in the Whalers Bay area north of Svalbard. The amount of heat transported from the Atlantic Ocean, and storm frequency both […]
Science Advances, September 2 Summer sea ice minimums receive the most attention; but Arctic sea ice has been declining year-round, and new reconstructions place the 2018 winter maximum in the Bering Sea as the lowest in at least 5500 years. The 2018 and 2019 maximums were also 60-70% lower than the averages recorded since consistent […]
Copernicus Atmosphere Monitoring Service, September 3 Arctic fire emissions – those directly caused by humans, as well as those from natural phenomena such as lightning strikes – already are one-third higher than the 2019 total, which itself broke the previous record. The CO2 released from these fires through the end of August totalled around 244 […]
冰冻圈，8月28日北冰洋部分地区的降雨事件在最近的几十年里几乎提前了4-6天，加速了北冰洋太平洋区域和西伯利亚以上欧亚边缘海的冰融化。这项研究结合了北极海岸有限的实地观测[...]
Nature, Communications Earth & Environment, August 13 Acceleration of outlet glaciers from the Greenland ice sheet, not compensated by accumulation above makes it the current largest contributor to sea level rise. Through the 1980s and 1990s, losses through iceberg calving and melting were replaced by snowfall, keeping the ice sheet in balance. However, starting in […]
Nature Climate Change, August 10 The Arctic Ocean could be seasonally ice-free at temperatures only slightly above today’s, once land-based Arctic summer temperatures average 4 to 5°C above pre-industrial. This would occur by summer 2035 under high emissions scenarios; parts of the Arctic were already far warmer this summer. These new simulations using CMIP6, by […]
Water and Ice Research Laboratory, August 7 This extremely warm summer is driving some dramatic collapses: one of the last remaining Canadian Ice Shelves, the Milne Ice Shelf lost 43% of its area (80 km2, greater than the size of Manhattan) in a dramatic collapse on July 31st, compromising nearby ecosystems as well as threatening […]
Nature, July 29 Over the past 40 years, the rate of change in large portions of the Arctic appears comparable to past rapid warming events, going back to the last interglacial period as reflected in this analysis of Greenland ice cores. These past warming events were typically characterized by warming rates of 1-2°C per decade […]
2020年对北极来说是异常炎热的一年，尤其是在俄罗斯北部高纬度地区。从1月份开始，一股持续的持续热浪打破了纪录，在6月份达到38摄氏度（100.4华氏度）的峰值。从那以后，极端高温持续不断。例如，西伯利亚的俄罗斯城镇维尔霍扬斯克已经经历了11天以上……