Characteristics of summer water balance in eastern Siberian tundra watershed

• Main Authors: サトウ ノリフミ, イシイ ヨシユキ, コダマ ユウジ, ノムラ ムツミ, イシカワ ノブヨシ, コバヤシ ダイジ, Norifumi Sato, Yoshiyuki Ishii, Yuji Kodama, Mutsumi Nomura, Nobuyoshi Ishikawa, Daiji Kobayashi
• Format: Report
• Language: English
• Published: Scientific Paper 2001
• Subjects: Tiksi; Polar meteorology and glaciology; Tundra; Siberia
• Online Access: https://nipr.repo.nii.ac.jp/?action=repository_uri&item_id=2933; http://id.nii.ac.jp/1291/00002933/; https://nipr.repo.nii.ac.jp/?action=repository_action_common_download&item_id=2933&item_no=1&attribute_id=18&file_no=1

Hydrological observations were carried out in a tundra watershed near Tiksi, eastern Siberia during summer in 1997,1998 and 1999,and characteristics of the summer water balance are discussed. Due to strong wind in winter and low height vegetation, snowdrift is a common feature in the tundra area, and remain as snow patches until the middle of summer, supplying meltwater to rivers. In the summer water balance analysis, we introduced the ratio α of the snow patch area to the whole watershed area as a tuning parameter for taking into account the meltwater from the snow patches. The obtained results are as follows : The contribution of meltwater from snow patches to discharge continued in summer after the main snowmelt period. Rainfall and snowmelt amount changed substantially from year to year. The major output component was discharge. The contribution of evapotranspiration to the output varied year to year. The storage change was small compared with the other components.