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Browsing College of Sciences and Mathematics by Author "Tian, Hanqin"

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Effect of continued nitrogen enrichment on greenhouse gas emissions from a wetland ecosystem in the Sanjiang Plain, Northeast China: A 5 year nitrogen addition experiment 

Song, Changchun; Wang, Lili; Tian, Hanqin; Liu, Deyan; Lu, Chaoqun; Xu, Xiaofeng; Zhang, Lihua; Yang, Guisheng; Wan, Zhongmei; 0000-0002-6553-6514; 0000-0002-1806-4091; 0000-0002-1526-0513; 0000-0002-6553-6514; 0000-0002-1526-0513 (2023-01-25)
Mounting evidence supports that wetland ecosystems, one of the largest carbon pools on the earth, are exposed to ample nitrogen (N) additions due to atmospheric deposition or N loading from upstream agricultural fertilizer ...

A growing importance of large fires in conterminous United States during 1984-2012 

Yang, Jia; Tian, Hanqin; Tao, Bo; Ren, Wei; Pan, Shufen; Liu, Yongqiang; Wang, Yuhang; 0000-0003-2019-9603; 0000-0002-1806-4091; 0000-0002-7290-2551; 0000-0002-4840-4835 (2022-12-01)
Fire frequency, extent, and size exhibit a strong linkage with climate conditions and play a vital role in the climate system. Previous studies have shown that the frequency of large fires in the western United States ...

Increased nitrogen export from eastern North America to the Atlantic Ocean due to climatic and anthropogenic changes during 1901-2008 

Yang, Qichun; Tian, Hanqin; Friedrichs, Marjorie; Hopkinson, Charles; Lu, Chaoqun; Najjar, Raymond; 0000-0002-1806-4091; 0000-0002-1526-0513; 0000-0002-1526-0513; 0000-0002-7331-8322; 0000-0002-8689-2550; 0000-0003-2828-7595 (2023-01-25)
We used a process-based land model, Dynamic Land Ecosystem Model 2.0, to examine how climatic and anthropogenic changes affected riverine fluxes of ammonium (NH4+), nitrate (NO3-), dissolved organic nitrogen (DON), and ...

Large increase in dissolved inorganic carbon flux from the Mississippi River to Gulf of Mexico due to climatic and anthropogenic changes over the 21st century 

Ren, Wei; Tian, Hanqin; Tao, Bo; Yang, Jia; Pan, Shufen; Cai, Wei-Jun; Lohrenz, Steven; He, Ruoying; Hopkinson, Charles; 0000-0002-4840-4835; 0000-0003-2019-9603; 0000-0003-3811-2975; 0000-0002-1806-4091; 0000-0003-3606-8325; 0000-0002-7331-8322; 0000-0001-7920-1427 (2023-01-26)
It is recognized that anthropogenic factors have had a major impact on carbon fluxes from land to the ocean during the past two centuries. However, little is known about how future changes in climate, atmospheric CO2, and ...