Solar radiation transfer for an ice-covered lake in the central Asian arid climate zone

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Cao , X , Lu , P , Leppäranta , M , Arvola , L , Huotari , J , Shi , X , Li , G & Li , Z 2021 , ' Solar radiation transfer for an ice-covered lake in the central Asian arid climate zone ' , Inland waters , vol. 11 , no. 1 , pp. 89-103 . https://doi.org/10.1080/20442041.2020.1790274

Title: Solar radiation transfer for an ice-covered lake in the central Asian arid climate zone
Author: Cao, Xiaowei; Lu, Peng; Leppäranta, Matti; Arvola, Lauri; Huotari, Jussi; Shi, Xiaohong; Li, Guoyu; Li, Zhijun
Contributor: University of Helsinki, Institute for Atmospheric and Earth System Research (INAR)
University of Helsinki, Lammi Biological Station
University of Helsinki, Lammi Biological Station
Date: 2021
Language: eng
Number of pages: 16
Belongs to series: Inland waters
ISSN: 2044-2041
URI: http://hdl.handle.net/10138/334015
Abstract: 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.
Subject: IRRADIANCE
OPTICAL-PROPERTIES
OXYGEN
SHALLOW LAKE
SNOW
TEMPERATURE
WATER
absorption
albedo
irradiance
lake ice
snow
transmittance
1171 Geosciences
114 Physical sciences
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