CH 4 Emissions Characteristics and Its Influencing Factors in an Eutrophic Lake

被引：0
|
作者：
Shang D.-Y. [1 ]
Xiao Q.-T. [2 ]
Hu Z.-H. [1 ]
Xie Y.-H. [3 ]
Huang W.-J. [3 ]
Zhang M. [3 ]
机构：
[1] Collaborative Innovation Center on Forecast and Evaluation of Meteorological Disasters, Jiangsu Key Laboratory of Agricultural Meteorology, Nanjing University of Information Science & Technology, Nanjing
[2] Key Laboratory of Watershed Geographic Science, Nanjing Institute of Geography and Limnology, Chinese Academy of Sciences, Nanjing
[3] Yale-NUIST Center on Atmospheric Environment, Nanjing University of Information Science & Technology, Nanjing
来源：
Huanjing Kexue/Environmental Science | 2018年 / 39卷 / 11期
关键词：
Diffusion flux; Eutrophic lake; Influencing factors; Spatial variation; Temporal variation;
D O I：
10.13227/j.hjkx.201803128
中图分类号：
学科分类号：
摘要：
In order to identify methane (CH 4 ) diffusion emissions characteristics and their impact factors in an eutrophic lake, CH 4 flux across the lake-air interface was observed in Meiliang Bay and the central zone of Lake Taihu over one year. The relationships between CH 4 flux and environmental factors and water quality indices were analyzed. The results indicated that the annual mean CH 4 diffusion flux in the eutrophic zone was significantly higher than that in the central zone, which were 0.140 mmol•(m 2 •d) -1 and 0.024 mmol•(m 2 •d) -1 , respectively. Additionally, the highest CH 4 flux appeared in the eutrophic littoral zone. The CH 4 flux varied seasonally, which was consistent with water temperature that peaked in summer. Furthermore, the difference in CH 4 flux between seasons was an order of magnitude. The temporal variation in CH 4 flux was mostly driven by wind speed and water temperature. The spatial correlation between CH 4 flux and dissolved organic carbon concentration was highly significant (R 2 =0.62, P<0.01). Observing temporal and spatial patterns of CH 4 flux was necessary to accurately estimate whole-lake CH 4 emissions due to large variability across time and space. © 2018, Science Press. All right reserved.
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页码：5227 / 5236
页数：9
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  • [1] Kirschke S., Bousquet P., Ciais P., Et al., Three decades of global methane sources and sinks, Nature Geoscience, 6, 10, pp. 813-823, (2013)
  • [2] Nisbet E.G., Dlugokencky E.J., Bousquet P., Methane on the rise-again, Science, 343, 6170, pp. 493-495, (2014)
  • [3] Stocker B.D., Roth R., Joos F., Et al., Multiple greenhouse-gas feedbacks from the land biosphere under future climate change scenarios, Nature Climate Change, 3, 7, pp. 666-672, (2013)
  • [4] Bastviken D., Tranvik L.J., Downing J.A., Et al., Freshwater methane emissions offset the continental carbon sink, Science, 331, 6013, (2011)
  • [5] Li S.Y., Bush R.T., Revision of methane and carbon dioxide emissions from inland waters in India, Global Change Biology, 21, 1, pp. 6-8, (2015)
  • [6] Verpoorter C., Kutser T., Seekell D.A., Et al., A global inventory of lakes based on high-resolution satellite imagery, Geophysical Research Letters, 41, 18, pp. 6396-6402, (2014)
  • [7] Tranvik L.J., Downing J.A., Cotner J.B., Et al., Lakes and reservoirs as regulators of carbon cycling and climate, Limnology and Oceanography, 54, 6, pp. 2298-2314, (2009)
  • [8] Marotta H., Pinho L., Gudasz C., Et al., Greenhouse gas production in low-latitude lake sediments responds strongly to warming, Nature Climate Change, 4, 6, pp. 467-470, (2014)
  • [9] Yvon-Durocher G., Allen A.P., Bastviken D., Et al., Methane fluxes show consistent temperature dependence across microbial to ecosystem scales, Nature, 507, 7493, pp. 488-491, (2014)
  • [10] Bastviken D., Cole J., Pace M., Et al., Methane emissions from lakes: Dependence of lake characteristics, two regional assessments, and a global estimate, Global Biogeochemical Cycles, 18, 4, (2004)
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