LAKE 2.0: a model for temperature, methane, carbon dioxide and oxygen dynamics in lakes

被引:95
作者
Stepanenko, Victor [1 ]
Mammarella, Ivan [2 ]
Ojala, Anne [3 ,4 ]
Miettinen, Heli [5 ]
Lykosov, Vasily [1 ,6 ]
Vesala, Timo [2 ,3 ]
机构
[1] Moscow MV Lomonosov State Univ, GSP 1,Leninskie Gory 1,Bld 4, Moscow 119234, Russia
[2] Univ Helsinki, Dept Phys, POB 48, FIN-00014 Helsinki, Finland
[3] Univ Helsinki, Dept Forest Sci, POB 27, FIN-00014 Helsinki, Finland
[4] Univ Helsinki, Dept Environm Sci, Niemenkatu 73, Helsinki 15140, Finland
[5] Univ Helsinki, Dept Environm Sci, POB 65, FIN-00014 Helsinki, Finland
[6] Russian Acad Sci, Inst Numer Math, Gubkina 8, Moscow 119333, Russia
基金
芬兰科学院;
关键词
GREENHOUSE-GAS; BOREAL LAKE; INTERNAL SEICHE; SURFACE-WATER; FLUXES; ATMOSPHERE; TURBULENCE; EMISSIONS; SEDIMENT; PARAMETERIZATION;
D O I
10.5194/gmd-9-1977-2016
中图分类号
P [天文学、地球科学];
学科分类号
07 ;
摘要
A one-dimensional (1-D) model for an enclosed basin (lake) is presented, which reproduces temperature, horizontal velocities, oxygen, carbon dioxide and methane in the basin. All prognostic variables are treated in a unified manner via a generic 1-D transport equation for horizontally averaged property. A water body interacts with underlying sediments. These sediments are represented by a set of vertical columns with heat, moisture and CH4 transport inside. The model is validated vs. a comprehensive observational data set gathered at Kuivajarvi Lake (southern Finland), demonstrating a fair agreement. The value of a key calibration constant, regulating the magnitude of methane production in sediments, corresponded well to that obtained from another two lakes. We demonstrated via surface seiche parameterization that the near-bottom turbulence induced by surface seiches is likely to significantly affect CH4 accumulation there. Furthermore, our results suggest that a gas transfer through thermocline under intense internal seiche motions is a bottleneck in quantifying greenhouse gas dynamics in dimictic lakes, which calls for further research.
引用
收藏
页码:1977 / 2006
页数:30
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