Journal of Geographical Sciences ›› 2019, Vol. 29 ›› Issue (5): 658-674.doi: 10.1007/s11442-019-1620-3
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Yuan ZHANG1,2(), Shuying ZANG3,*(
), Li SUN3, Binghe YAN3, Tianpeng YANG1, Wenjia YAN1, E Michael MEADOWS1,4, Cuizhen WANG5, Jiaguo QI6
Received:
2018-01-10
Accepted:
2018-04-10
Online:
2019-05-25
Published:
2019-04-19
Contact:
Shuying ZANG
E-mail:yzhang@geo.ecnu.edu.cn;syzang@yahoo.com
About author:
Author: Zhang Yuan (1975-), PhD and Associate Professor, specialized in remote sensing of agroecology. E-mail:
Supported by:
Yuan ZHANG, Shuying ZANG, Li SUN, Binghe YAN, Tianpeng YANG, Wenjia YAN, E Michael MEADOWS, Cuizhen WANG, Jiaguo QI. Characterizing the changing environment of cropland in the Songnen Plain, Northeast China, from 1990 to 2015[J].Journal of Geographical Sciences, 2019, 29(5): 658-674.
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Table 1
Landsat-5 TM images acquired in 1990 and Landsat-8 OLI in 2015/2016 for cropland mapping"
RS imagery | Path No. | Acquisition date for each row No. | ||||
---|---|---|---|---|---|---|
R26 | R27 | R28 | R29 | R30 | ||
Landsat-5 TM | P117 | - | 1990/6/20, 1990/8/07 | 1990/6/20, 1990/8/07 | 1990/8/07 | - |
P118 | 1990/6/27 | 1990/6/27 | 1990/6/27, 1990/9/15 | 1990/6/27, 1990/9/15 | 1990/6/27, 1990/9/15 | |
P119 | 1990/7/04, 1990/9/06 | 1990/7/20, 1990/9/06 | 1990/7/20, 1990/9/06 | 1990/7/04 | - | |
P120 | 1990/6/25 | 1990/6/25 | 1990/6/25 | 1990/7/11 | - | |
P121 | - | - | 1990/8/03 | - | - | |
Landsat-8 OLI | P117 | - | 2015/9/29 | 2015/5/24 | 2015/5/24 | - |
P118 | 2016/5/17 | 2016/5/17 | 2016/5/17 | 2016/5/17 | 2016/5/17 | |
P119 | 2015/9/24 | 2015/5/22 | 2015/5/22 | 2015/5/22 | 2015/6/23 | |
P120 | 2016/5/31 | 2016/5/31 | 2016/5/31 | 2016/5/31 | - | |
P121 | - | - | 2015/6/21 | - | - |
Figure 4
Climate parameters in the Songnen Plain from 1990 to 2015. (a) annual sunshine hours and annual mean temperature, (b) annual precipitation and annual mean wind speed, (c) sunshine hours and mean temperature in the growing season (May-October), and (d) precipitation and mean wind speed in the growing season"
Figure 5
Trends of 4 main climate factors for growing season (May to October) by using Mann-Kendall (MK) trend test tool, where the Z value is denoted by the changing significance of climate factors. (a) mean temperature, (b) sunshine hours, (c) precipitation and (d) mean wind speed; positive values denote increase and negative values denote decrease over the period 1990-2015"
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