阅海湿地芦苇NPP遥感估算及其时空变化分析

doi:10.3969/j.issn.1673-503X.2021.06.009

Abstract

Abstract:

Using Landsat 5 data from 1987 to 2012, and Landsat 8 data from 2013 to 2017, the spatio-temporal characteristics and changing trends of net primary productivity (NPP) in Yuehai Wetland from 1987 to 2017 were analyzed.At the same time, based on high-resolution (Gaofen) data (GF2), the spatio-temporal changes of NPP with 4 m resolution from 2015 to 2017 were estimated and compared with Landsat results.The results show that the NPP in 2002 was the lowest with a value of 691.11 g·C·m^-2, and the average NPP increased firstly and then decreased from 2003 to 2007.After 2008, the average NPP tended to be stable.Reeds are distributed widely in the central and surrounding areas in Yuehai Wetland from the 1980s to the 1990s.And then reeds are concentrated in the northeastern region of the wetland from the 2000s to the 2010s.NPP of Yuehai Wetland changed significantly from 1987 to 2017.The area in the northeastern region of Yuehai Wetland is a decreasing trend.Comparing the average NPP retrieved by GF2 and Landsat in Yuehai Wetland from 2016 to 2017, it can be found that there is no significant difference between them and their changing trends are consistent.

Key words: Remote sensing retrieval, Net primary productivity, Reed

CLC Number:

TP79
Q948.1

Yu-feng ZHONG, Tao NIU, Wen-xian JIA, Yun-lei CUI, Hong-li LIU, Bo-wen DENG, Yang CUI, Men-xin WU. Remote sensing estimation of reed NPP in Yuehai Wetland and characteristic analysis of its temporal and spatial changes[J]. Journal of Meteorology and Environment, 2021, 37(6): 71-78.

Figures/Tables 7

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年份	Landsat 8/(g·C·m^-2)	GF2/(g·C·m^-2)
2016	1188.33	1254.64
2017	1049.37	1175.00

样本	位置	株数/株	鲜重/(g·m^-2)	干重/(g·m^-2)	采样NPP/(g·C·m^-2)
水生1	38°32′12″N 106°11′34″E	172	7654.82	3775.53	1698.99
水生2	38°32′44″N 106°11′42″E	179	10430.47	4896.97	2203.63
水生3	38°32′39″N 106°11′52″E	200	9401.34	4663.95	2098.78
陆生1	38°32′37″N 106°11′40″E	279	1379.94	674.34	303.45
陆生2	38°32′30″N 106°11′27″E	362	1100.75	585.72	263.57
陆生3	38°32′26″N 106°11′22″E	183	1289.94	752.71	338.72
	均值		5209.54	2558.20	1151.19

统计量	月平均气温/℃			月累计降水量/mm
统计量	6月	7月	8月	6月	7月	8月
相关系数	-0.19	-0.14	-0.03	0.05	-0.12	-0.06
显著性(P)	0.31	0.46	0.86	0.80	0.53	0.77

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Remote sensing estimation of reed NPP in Yuehai Wetland and characteristic analysis of its temporal and spatial changes

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