Variation of Arctic runoff and its association with climate factors

SUI Cui-juan; ZHANG Zhan-hai; LIU Jiping; SHAN Yan-yan

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SUI Cui-juan, ZHANG Zhan-hai, LIU Jiping, SHAN Yan-yan. Variation of Arctic runoff and its association with climate factors[J]. Haiyang Xuebao, 2008, 30(4): 39-47.

Citation:

SUI Cui-juan, ZHANG Zhan-hai, LIU Jiping, SHAN Yan-yan. Variation of Arctic runoff and its association with climate factors[J]. Haiyang Xuebao, 2008, 30(4): 39-47.

SUI Cui-juan, ZHANG Zhan-hai, LIU Jiping, SHAN Yan-yan. Variation of Arctic runoff and its association with climate factors[J]. Haiyang Xuebao, 2008, 30(4): 39-47.

Citation:

SUI Cui-juan, ZHANG Zhan-hai, LIU Jiping, SHAN Yan-yan. Variation of Arctic runoff and its association with climate factors[J]. Haiyang Xuebao, 2008, 30(4): 39-47.

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Variation of Arctic runoff and its association with climate factors

1.
National Marine Environmental Forecasting Center, Beijing 100081, China
2.
Polar Research Institute of China, Shanghai 200136, China
3.
State Key Laboratory of Numerical Modeling for Atmospheric Science and Geophysical Fluid Dynamics, Institute of Atmospheric Physics, Chinese Academy of Sciences, Beijing 100029, China

Received Date: 2008-01-11
Rev Recd Date: 2008-04-17

Abstract

Abstract

Using the latest Arctic runoff data set,including R-ArcticNET V3.0 and ArcticRIMS,analyze the seasonal variation and decadal trend of four dominant rivers that flow into the Arctic.The results show that there is a sharp increase of the Arcticrunoff from April to June,which is primarily due to snow melt when surface air temperature exceeds the freezing point.The contribution of the precipitation is secondary.The discharge into the Arctic from Eurasia has increased for the past 70 years,whereas the discharge from North American has decreased for the past 30 year.However,the total discharge into the Arctic has increased.More importantly,the decadal trend of the Arctic runoff is seasonally dependent.There is a downward trend in summer and autumn,and an upward trend in spring and winter.Wefurther discuss the influence of atmospheric circulation and surface climate conditions on seasonal discharges of the four rivers.The results suggest that the North Atlantic Oscillation (North Pacific Index) has positive correlation with discharge in winter and spring from Eurasia (North American).Surface air tem perature in spring has positive (negative) relationship with discharges in spring (summer).Precipitation and discharges show almost simultaneous in-phase relationship.Snow cover in spring has negative (positive) correlation with runoff in spring (summer).Summer snow cover has positive relationship with summer runoff.
- Arctic runoff,
- atmospheric circulation,
- surface air temperature,
- precipitation,
- snow cover

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References(22)

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