期刊
POLAR SCIENCE
卷 27, 期 -, 页码 -出版社
ELSEVIER
DOI: 10.1016/j.polar.2020.100601
关键词
Observational uncertainty; Radiosonde; Arctic challenge for sustainability; Year of polar prediction
资金
- Japanese Ministry of Education, Culture, Sports, Science and Technology (MEXT) through the Arctic Challenge for Sustainability Project (ArCS) [JPMXD1300000000]
- Arctic Challenge for Sustainability II (ArCS II) [JPMXD1420318865]
- JSPS KAKENHI [18H03745, 18KK0292]
- Grants-in-Aid for Scientific Research [18H03745, 18KK0292] Funding Source: KAKEN
By utilizing enhanced radiosonde observations during the Year of Polar Prediction at Ice Base Cape Baranova in 2018, researchers quantified the observational bias of a nearby station, GMO IM. The study found that the Fedorova station exhibited cold bias in the lower stratosphere during the cold season, as well as a periodic warm/cold bias dipole in the upper troposphere and lower stratosphere. The bias is attributed to errors in radiosonde sensors and radar inaccuracies at Russian observational stations, similar to results found at the Yuzhno-Sakhalinsk station.
Taking advantage of a unique configuration of upper-atmospheric observing stations, we used enhanced radiosonde observations acquired during the Year of Polar Prediction (YOPP) at Ice Base Cape Baranova in 2018 to quantify the observational bias of a nearby station, i.e., GMO IM. E. K. Fedorova located 184 km to the southeast. Radiosonde observations from Fedorova are transmitted to the Global Telecommunications System and thus assimilated into numerical forecast products; however, those from Baranova are not, providing a situation favorable for quantifying observational bias. In comparison with the background field of the ERA5 reanalysis dataset, the Fedorova temperature profile exhibited cold bias in the lower stratosphere during the cold season in addition to a periodic warm/cold bias dipole in the upper troposphere and lower stratosphere. It is concluded that such bias is the product of both radiosonde sensor error and radar inaccuracies at Russian observational stations, given a similar result found at the Yuzhno-Sakhalinsk station.
作者
我是这篇论文的作者
点击您的名字以认领此论文并将其添加到您的个人资料中。
推荐
暂无数据