气候变化领域集成服务门户(CCPortal): Under-Ice Dissolved Oxygen and Metabolism Dynamics in a Shallow Lake: The Critical Role of Ice and Snow

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DOI	10.1029/2020WR027990
	Under-Ice Dissolved Oxygen and Metabolism Dynamics in a Shallow Lake: The Critical Role of Ice and Snow
	Huang, Wenfeng; Zhang, Zheng; Li, Zhijun; Lepparanta, Matti; Arvola, Lauri; Song, Shuang; Huotari, Jussi; Lin, Zhanju
通讯作者	Huang, WF (通讯作者)，Changan Univ, Key Lab Subsurface Hydrol & Ecol Effect Arid Reg, Minist Educ, Xian, Peoples R China. ; Huang, WF (通讯作者)，Chinese Acad Sci, Northwest Inst Ecoenvironm & Resources, State Key Lab Frozen Soil Engn, Lanzhou, Peoples R China. ; Li, ZJ (通讯作者)，Dalian Univ Technol, State Key Lab Coastal & Offshore Engn, Dalian, Peoples R China.
发表日期	2021
ISSN	0043-1397
EISSN	1944-7973
卷号	57 期号:5
英文摘要	Interaction of under-ice physical, chemical, and biological processes with lake ice/snow cover is examined to better understand how changing winter climate may affect lake ecosystems. We derived under-ice dissolved oxygen (DO) dynamics from high-frequency observations and modified a widely used lake metabolism model by including the effect of freezing and thawing on DO concentration. Estimates were produced for the production and respiration in a shallow lake on the Mongolian Plateau in three winters. Diel, synoptic, and seasonal variations in DO concentration were detected as responses to solar radiation, episodic snowfall events, and occasional convective mixing. Based on the observations and a radiative transfer model, incident solar radiation was partitioned into reflectance, absorbance, and transmittance by the snow and ice cover. For bare ice, the contributions of these three parts were 35%, 39%, and 26%, respectively, while under a new 4.5 cm thick snow cover, the corresponding values were 79%, 17%, and 3%. This points out the critical role of snow and ice on under-ice light conditions, which is the primary forcing for the temperature and the rate of photosynthesis under ice. The results showed three principal factors, which influenced under-ice DO and metabolism: (1) thickness and optical properties of ice and snow, which affected the light transfer and depth of the euphotic zone, (2) mediated radiation and ice-water heat transfer which controlled water temperature, and (3) DO exclusion during freezing and dilution by melt water. This study highlights the ecosystem characteristics in shallow ice-covered lakes in arid temperate regions and promotes our understanding of the response of the cold aquatic environment to climate change.
关键词	SALT EXCLUSION WATER TEMPERATURE DEPLETION SEDIMENT MODELS REGIME
英文关键词	dissolved oxygen; lake ice and snow; lake metabolism; photosynthetically active radiation; temperature
语种	英语
WOS研究方向	Environmental Sciences & Ecology ; Marine & Freshwater Biology ; Water Resources
WOS类目	Environmental Sciences ; Limnology ; Water Resources
WOS记录号	WOS:000654464300015
来源期刊	WATER RESOURCES RESEARCH
来源机构	中国科学院西北生态环境资源研究院
文献类型	期刊论文
条目标识符	http://gcip.llas.ac.cn/handle/2XKMVOVA/254568
作者单位	[Huang, Wenfeng; Zhang, Zheng] Changan Univ, Key Lab Subsurface Hydrol & Ecol Effect Arid Reg, Minist Educ, Xian, Peoples R China; [Huang, Wenfeng; Lin, Zhanju] Chinese Acad Sci, Northwest Inst Ecoenvironm & Resources, State Key Lab Frozen Soil Engn, Lanzhou, Peoples R China; [Li, Zhijun] Dalian Univ Technol, State Key Lab Coastal & Offshore Engn, Dalian, Peoples R China; [Lepparanta, Matti] Univ Helsinki, Inst Atmospher & Earth Sci, Helsinki, Finland; [Arvola, Lauri; Huotari, Jussi] Univ Helsinki, Fac Biol & Environm Sci, Ecosyst & Environm Res Programme, Lammi, Finland; [Song, Shuang] Inner Mongolia Agr Univ, Water Conservancy & Civil Engn Coll, Hohhot, Peoples R China
推荐引用方式 GB/T 7714	Huang, Wenfeng,Zhang, Zheng,Li, Zhijun,et al. Under-Ice Dissolved Oxygen and Metabolism Dynamics in a Shallow Lake: The Critical Role of Ice and Snow[J]. 中国科学院西北生态环境资源研究院,2021,57(5).
APA	Huang, Wenfeng.,Zhang, Zheng.,Li, Zhijun.,Lepparanta, Matti.,Arvola, Lauri.,...&Lin, Zhanju.(2021).Under-Ice Dissolved Oxygen and Metabolism Dynamics in a Shallow Lake: The Critical Role of Ice and Snow.WATER RESOURCES RESEARCH,57(5).
MLA	Huang, Wenfeng,et al."Under-Ice Dissolved Oxygen and Metabolism Dynamics in a Shallow Lake: The Critical Role of Ice and Snow".WATER RESOURCES RESEARCH 57.5(2021).