Increasing Alaskan river discharge during the cold season is driven by recent warming
Increasing Alaskan river discharge during the cold season is driven by recent warming
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最近变暖导致阿拉斯加河流在寒冷季节的流量增加
DOI：
10.1088/1748-9326/acb661
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发表时间：
2023
影响因子：
6.7
通讯作者：
Musselman, Keith N.
中科院分区：
文献类型：
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作者：
Blaskey, Dylan;Koch, Joshua C.;Gooseff, Michael N.;Newman, Andrew J.;Cheng, Yifan;O’Donnell, Jonathan A.;Musselman, Keith N.
北极水文正在经历迅速的变化，包括积雪融化提前，永久冻土退化，活动层深度增加，河流冰层减少，所有这些都将导致河流流量状况的变化。最近，长期（> 60年）气候再分析和河流流量观测数据已经可用。我们利用这些数据来评估排放量及其水文气候驱动因素的长期变化。河流流量在寒冷的季节（10月至4月）增加了10%，每十年。最广泛的流量增加发生在4月（每十年15%），这是大多数流域的冰破裂月份。在10月，当河冰开始形成时，平均月流量每十年增加7%。10月和4月的长期气温上升增加了冰点以上的天数（每十年+1.1天），导致积雪消融增加（每十年20%）和雪水当量减少（每十年-12%）。与历史同期（1960-1989年）相比，近一个时期（1990-2019年）4月和10月平均气温与月径流量的相关系数较大，分别为0.33 - 0.68和0.0-0.48。这表明最近气温的上升与这些排放变化直接相关。普遍增加的冷和肩季排放量证明了水文和地球化学通量正在改变在北极的规模。
Arctic hydrology is experiencing rapid changes including earlier snow melt, permafrost degradation, increasing active layer depth, and reduced river ice, all of which are expected to lead to changes in stream flow regimes. Recently, long-term (> 60 years) climate reanalysis and river discharge observation data have become available. We utilized these data to assess long-term changes in discharge and their hydroclimatic drivers. River discharge during the cold season (October–April) increased by 10% per decade. The most widespread discharge increase occurred in April (15% per decade), the month of ice break-up for the majority of basins. In October, when river ice formation generally begins, average monthly discharge increased by 7% per decade. Long-term air temperature increases in October and April increased the number of days above freezing (+ 1.1 d per decade) resulting in increased snow ablation (20% per decade) and decreased snow water equivalent (− 12% per decade). Compared to the historical period (1960–1989), mean April and October air temperature in the recent period (1990–2019) have greater correlation with monthly discharge from 0.33 to 0.68 and 0.0–0.48, respectively. This indicates that the recent increases in air temperature are directly related to these discharge changes. Ubiquitous increases in cold and shoulder-season discharge demonstrate the scale at which hydrologic and biogeochemical fluxes are being altered in the Arctic.
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影响因子：
--
作者：
Ying Zhang;P. Cabilio;Khurram Nadeem
通讯作者：
Ying Zhang;P. Cabilio;Khurram Nadeem
安大略省远北詹姆斯湾西部地区冬季道路可行性和寿命变化对社区的脆弱性
影响因子：
4.2
作者：
Y. Hori;W. Gough;Benita Y. Tam;L. Tsuji
通讯作者：
L. Tsuji
DOI：
--
发表时间：
2019
期刊：
影响因子：
--
作者：
S. Daly;J. Rocks;Marina I. Reilly;A. Gelvin
通讯作者：
A. Gelvin
影响因子：
6.7
作者：
Koch, J. C.;Sjoberg, Y.;Terskaia, A.
通讯作者：
Terskaia, A.
加拿大永久冻土区平均和极端水流变化的气候控制
影响因子：
3.4
作者：
R. Shrestha;Jennifer C. Pesklevits;Daqing Yang;D. Peters;Y. Dibike
通讯作者：
Y. Dibike