Solar radiation transfer for an ice-covered lake in the central Asian arid climate zone
| Autor: | Matti Leppäranta, Xiaohong Shi, Lauri Arvola, Jussi Huotari, Xiaowei Cao, Peng Lu, Zhijun Li, Guoyu Li |
|---|---|
| Přispěvatelé: | Institute for Atmospheric and Earth System Research (INAR), Lammi Biological Station, Biological stations |
| Rok vydání: | 2020 |
| Předmět: |
1171 Geosciences
010504 meteorology & atmospheric sciences irradiance 0207 environmental engineering Irradiance 02 engineering and technology snow Aquatic Science Inner mongolia Atmospheric sciences 114 Physical sciences 01 natural sciences OXYGEN transmittance WATER 020701 environmental engineering Shallow lake TEMPERATURE 0105 earth and related environmental sciences Water Science and Technology lake ice Desert climate OPTICAL-PROPERTIES 15. Life on land Albedo Snow SHALLOW LAKE Radiation transfer 13. Climate action Environmental science Lake ice absorption albedo |
| Zdroj: | Inland Waters. 11:89-103 |
| ISSN: | 2044-205X 2044-2041 |
| DOI: | 10.1080/20442041.2020.1790274 |
| Popis: | Spectral albedo and light transmittance through snow, ice, and water were measured in Lake Wuliangsuhai (40 degrees 36 '-41 degrees 30 ' N, 108 degrees 43 '-108 degrees 70 ' E), Inner Mongolia, China, during winter 2016. Data on the weather, structure of lake ice, and geochemistry of water were also collected during the 60-day field program. The study lake is shallow (mean depth 1.0-1.5 m) with a large wetland area. Compared with polar lakes, solar elevation is higher, snow accumulation is much lower, and the ice has more sediment. The ice was all congelation ice with a mean thickness of 36.6 cm, corresponding to a mean air temperature of -9.6 degrees C. The mean daily broadband albedo and photosynthetically active radiation (PAR) band transmittance were 0.54 and 0.08 (bare ice), 0.74 and 0.04 (new snow), and 0.30 and 0.12 (melting period), respectively. The level of light allowed photosynthesis to occur to the bottom of the lake. The ice acted as a grey filter for the sunlight with a mean attenuation coefficient of 2.1 m(-1). These results expand our knowledge of the evolution of light transfer through ice and snow cover and its role in the ecology of lakes in temperate and arid areas. |
| Databáze: | OpenAIRE |
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