A systematic examination of the relationships between CDOM and DOC in inland waters in China
A systematic examination of the relationships between CDOM and DOC in inland waters in China
复制标题
系统考察中国内陆水域CDOM与DOC关系
DOI：
10.5194/hess-21-5127-2017
复制
发表时间：
2017-04
影响因子：
6.3
通讯作者：
Shang YX
中科院分区：
文献类型：
--
作者：
Song KS;Zhao Y;Wen ZD;Fang C;Shang YX
有色溶解性有机物（CDOM）在水生态系统的地球化学循环中起着重要的作用。研究了CDOM与溶解有机碳（DOC）的关系，为利用遥感数据估算DOC奠定了基础。对于近岸沃茨，已经建立了一种通过CDOM在275和295 nm处的吸收（a CDOM）反演DOC的算法，但对于其他类型的沃茨，DOC和a CDOM之间的关系尚不清楚。目前的研究检查了来自中国淡水湖，盐湖，河流和溪流，城市水体和冰封湖泊的样本。DOC与CDOM（275）的回归模型斜率范围从极低的0.33（高盐湖）到1.03（城市沃茨）和3.13（河流沃茨）。在盐湖沃茨和半干旱或干旱地区的沃茨中观察到较低的数值，由于臭氧层薄、云层较少、水停留时间和日照时间较长，预计这些地区会发生强烈的光漂白。相反，在中国东北地区的湿地或森林中发育的沃茨中发现了高值，大量的有机质从集水区输送到沃茨。研究还表明，当CDOM（275）被排序的CDOM（250）CDOM（365），这是一个示踪剂的CDOM吸收相对于其组成的比例，并确定的系数为0.78至0.99不等的沃茨的CDOM和DOC之间的关系被揭示。研究结果表明，不同内陆沃茨中CDOM与DOC的关系存在差异，因此，需要根据水体类型调整与CDOM吸收相关的DOC遥感估算模型。
Chromophoric dissolved organic matter (CDOM) plays a vital role in the biogeochemical cycle in aquatic ecosystems. The relationship between CDOM and dissolved organic carbon (DOC) has been investigated, and the significant relationship lays the foundation for the estimation of DOC using remotely sensed imagery data. An algorithm has been developed to retrieve DOC via CDOM absorption (a CDOM ) at 275 and 295 nm for coastal waters, but it is still unclear for the relationship between DOC and a CDOM in other types of waters. The current study examined the samples from freshwater lakes, saline lakes, rivers and streams, urban water bodies, and ice-covered lakes in China. The regression model slopes for DOC versus a CDOM (275) ranged from extreme low 0.33 (highly saline lakes) to 1.03 (urban waters) and 3.13 (river waters). The low values were observed in saline lake waters and waters from semi-arid or arid regions where strong photo-bleaching is expected due to thin ozone layers, less cloud cover, longer water residence time and daylight hours. In contrast, high values were found in waters developed in wetlands or forest in Northeast China, where massive organic matter was transported from catchment to waters. The study also demonstrated that stronger relationships between CDOM and DOC were revealed when a CDOM (275) were sorted by the ratio of a CDOM (250) to a CDOM (365), which is a tracer for the CDOM absorption with respect to its composition, and the determination of coefficient of the regression models ranged from 0.78 to 0.99 for different groups of waters. Our results indicated the relationships between CDOM and DOC are variable for different inland waters, and therefore remote sensing models for DOC estimation through linking with CDOM absorption need to be tailored according to water types.
登录
查看更多内容
DOI：
--
发表时间：
2007
期刊：
--
影响因子：
--
作者：
Wang Xiao-yong
通讯作者：
Wang Xiao-yong
影响因子：
4.5
作者：
James H. Larson;P. Frost;Zhiyu Zheng;C. Johnston;S. Bridgham;D. Lodge;G. Lamberti
通讯作者：
James H. Larson;P. Frost;Zhiyu Zheng;C. Johnston;S. Bridgham;D. Lodge;G. Lamberti
影响因子：
4.5
作者：
Zhang, Yunlin;Zhang, Enlou;Qin, Boqiang
通讯作者：
Qin, Boqiang
影响因子：
2.8
作者：
C. Le;Chuanmin Hu;Jennifer P. Cannizzaro;H. Duan
通讯作者：
C. Le;Chuanmin Hu;Jennifer P. Cannizzaro;H. Duan
DOI：
10.1016/j.scitotenv.2012.11.058
发表时间：
2013-02
期刊：
The Science of the total environment
影响因子：
--
作者：
Kun Shi;Yunmei Li;Lin Li;Heng Lu;K. Song;Zhong-hua Liu;Yifan Xu;Zuchuan Li
通讯作者：
Kun Shi;Yunmei Li;Lin Li;Heng Lu;K. Song;Zhong-hua Liu;Yifan Xu;Zuchuan Li