Factors controlling and variations of CO2 fluxes during the growing season in Gurbantunggut Desert

被引:12
作者
Amar, Gulnur [1 ,2 ,3 ]
Mamtimin, Ali [2 ,3 ]
Wang, YongHui [1 ,4 ]
Wang, Yu [2 ,3 ]
Gao, JiaCheng [2 ,3 ]
Yang, Fan [2 ,3 ]
Song, Meiqi [2 ,3 ]
Aihaiti, Ailiyaer [2 ,3 ]
Wen, Cong [2 ,3 ]
Liu, Junjian [2 ,3 ]
机构
[1] Xinjiang Normal Univ, Sch Geog Sci & Tourism, Urumqi 830054, Peoples R China
[2] China Meteorol Adm, Inst Desert Meteorol, Urumqi 830002, Peoples R China
[3] Xinjiang Key Lab Desert Meteorol & Sandstorm, Natl Observat & Res Stn Desert Meteorol, Taklimakan Desert Meteorol Field Expt Stn China Me, Taklimakan Desert Xinjiang, Urumqi 830002, Peoples R China
[4] Xinjiang Normal Univ, Xinjiang Lab Lake Environm & Resources Arid Zone, Urumqi 830054, Xinjiang, Peoples R China
基金
中国国家自然科学基金;
关键词
Gurbantunggut desert; Eddy covariance; Carbon flux; Environmental factor; NET ECOSYSTEM EXCHANGE; CARBON FLUX; ASSIMILATION; RESPIRATION; SEPARATION; BUDGET; CHINA; SOILS; LAKE;
D O I
10.1016/j.ecolind.2023.110708
中图分类号
X176 [生物多样性保护];
学科分类号
090705 ;
摘要
Although previous studies have illustrated the variation of CO2 fluxes in different terrestrial ecosystems, more needs to be reported on desert ecosystems. This study, based on the eddy covariance (EC) measurements data over the Gurbantunggut Desert, analyzed the controlling factors and variations of net ecosystem exchange (NEE), gross primary production (GPP), and ecosystem respiration (Reco) during the growing season (AprilSeptember2021) in Gurbantunggut Desert. The results were as follows: 1) Carbon fluxes in the Gurbantunggut Desert had prominent daily and seasonal variations during the growing season. On the daily scale, it showed a net uptake during the day and a net release at night, and the monthly average daily change curve of NEE was '' U '' shaped; on the seasonal scale, carbon uptake was observed in all months, with a peak of -37.76 gCm (-2) month (-1) in May. 2)The cumulative amounts of NEE, GPP, and Reco in the Gurbantunggut Desert were -193.74, 235.43, and 41.69 g Cm (-2), respectively, throughout the growing season, showing carbon sinks. 3) Correlation analysis with environmental factors revealed that NEE, GPP, and Reco of desert ecosystems were highly significantly correlated with photosynthetically active radiation (PAR) at different time scales (p < 0.01). Second, at the halfhourly scale, all environmental factors showed vital significance, with a high correlation with air temperature (Tair) and soil temperature (Tsoil); at the monthly scale, they were significantly correlated with Precipitation (p < 0.05). 4) Photosynthetically active radiation is the dominant factor affecting the daily net ecosystem carbon exchange rate. The two are consistent with the rectangle hyperbola model where the daily net ecosystem carbon exchange rate decreases with increasing photosynthetically active radiation. The results indicate that carbon fluxes in the growing season of the Gurbantunggut Desert ecosystem are more sensitive to the response of photosynthetically active radiation. The results have significant reference value for further understanding and research in predicting the source-sink function and influence mechanism of desert ecosystems.
引用
收藏
页数:9
相关论文
共 37 条
[1]  
Ali Mamtimin, 2015, Study on Characteristics and Influencing Factors of Carbon Exchange of Desert Area in XINJIANG
[2]  
[白雪洁 Bai Xuejie], 2022, [遥感技术与应用, Remote Sensing Technology and Application], V37, P94
[3]  
Chai Xi Chai Xi, 2018, Chinese Journal of Plant Ecology, V42, P6, DOI 10.17521/cjpe.2017.0266
[4]   Factors controlling evaporation and the CO2 flux over an open water lake in southwest of China on multiple temporal scales [J].
Du, Qun ;
Liu, Hui Zhi ;
Liu, Yang ;
Wang, Lei ;
Xu, Lu Jun ;
Sun, Ji Hua ;
Xu, An Lun .
INTERNATIONAL JOURNAL OF CLIMATOLOGY, 2018, 38 (13) :4723-4739
[5]  
Feng W, 2015, OTOSYTHETIC CARBON F
[6]  
[高佳程 Gao Jiacheng], 2021, [中国沙漠, Journal of Desert Research], V41, P47
[7]  
[高延锋 Gao Yanfeng], 2022, [中国草地学报, Chinese Journal of Grassland], V44, P1
[8]   Seasonal variation of carbon exchange from a revegetation area in a Chinese desert [J].
Gao, Yanhong ;
Li, Xinrong ;
Liu, Lichao ;
Jia, Rongliang ;
Yang, Haotian ;
Li, Gang ;
Wei, Yongping .
AGRICULTURAL AND FOREST METEOROLOGY, 2012, 156 :134-142
[9]  
IPCC, 2021, CLIMATE CHANGE PHYS, P2021
[10]   Anthropogenic and natural CO2 emission sources in an arid urban environment [J].
Koerner, B ;
Klopatek, J .
ENVIRONMENTAL POLLUTION, 2002, 116 :S45-S51