@article{oai:nipr.repo.nii.ac.jp:00010023, author = {Yang, Daqing and Marsh, Philip and Ge, Shaoqing and Yang, Daqing and Marsh, Philip and Ge, Shaoqing}, issue = {3}, journal = {Polar science, Polar science}, month = {Sep}, note = {This study analyzes long-term (40-60 years) discharge and water temperature records collected near the basin outlets of the Yukon and Mackenzie Rivers. It defines seasonal cycles of discharge, water temperature (WT), and heat flux (HF) for the basins, and compares their main features to understand their similarity and difference. Both rivers have similar hydrographs, i.e. low flows in winter and high discharge in summer, with the peak flood in June due to snowmelt runoff. Mackenzie River has many large lakes and they sustain the higher base flows over the fall/winter season. Mackenzie basin is large with high precipitation, thus producing 50% more discharge than the Yukon River to the Arctic Ocean. The WT regimes are also similar between the two rivers. Yukon River WT is about 2-3 °C warmer than the Mackenzie over the open water months. Both rivers have the highest WT in the mid summer and they transport large amount of heat to the polar ocean system. Yukon River monthly HF is lower by 10-60% than the Mackenzie mainly due to smaller discharge. Mackenzie River heat transport peaks in July, while the Yukon HF reaches the maximum in June and July. These results provide critical knowledge of river thermal condition and energy transport to the northern seas. They are useful for large-scale climate and ocean model development and validation, and climate/hydrology change research in the northern regions., ユーコン川とマッケンジー川の流出量と水温のデータを基に、両河川の類似点と相違点を分析した。両河川では冬に小流量、その後融雪のために6月に極大を示し、夏は大流量を示す点で類似している。しかし、マッケンジー川は秋から冬にかけて大きな基底流量を維持し、また降水量も多いので、流出量はユーコン川よりも50%大きい。両河川ともに真夏に水温が年間で最高となり、大量の熱を極域の海洋へと輸送する。ユーコン川の流出量はマッケンジー川よりも小さく、そのためユーコン川の熱フラックスはマッケンジー川のそれより10~60%小さい。以上のような結果は、大スケールの気候や海洋のモデル開発やその検証、それから北方域における気候や水文学的な変化についての研究に役立つだろう。}, pages = {232--241}, title = {Heat flux calculations for Mackenzie and Yukon Rivers}, volume = {8}, year = {2014} }