Zhang, Guoqing; Xie, Hongjie; Kang, Shichang; Yi, Donghui; Ackley, Stephen F (2011): (Table 1) Lake elevation change derived from 4 or more years of measurements [dataset]. PANGAEA, https://doi.org/10.1594/PANGAEA.842774, Supplement to: Zhang, G et al. (2011): Monitoring lake level changes on the Tibetan Plateau using ICESat altimetry data (2003-2009). Remote Sensing of Environment, 115(7), 1733-1742, https://doi.org/10.1016/j.rse.2011.03.005
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Abstract:
In this study, ICESat altimetry data are used to provide precise lake elevations of the Tibetan Plateau (TP) during the period of 2003-2009. Among the 261 lakes examined ICESat data are available on 111 lakes: 74 lakes with ICESat footprints for 4-7 years and 37 lakes with footprints for 1 -3 years. This is the first time that precise lake elevation data are provided for the 111 lakes. Those ICESat elevation data can be used as baselines for future changes in lake levels as well as for changes during the 2003-2009 period. It is found that in the 74 lakes (56 salt lakes) examined, 62 (i.e. 84%) of all lakes and 50 (i.e. 89%) of the salt lakes show tendency of lake level increase. The mean lake water level increase rate is 0.23 m/year for the 56 salt lakes and 0.27 m/year for the 50 salt lakes of water level increase. The largest lake level increase rate (0.80 m/year) found in this study is the lake Cedo Caka. The 74 lakes are grouped into four subareas based on geographical locations and change tendencies in lake levels. Three of the four subareas show increased lake levels. The mean lake level change rates for subareas I, II, III, IV, and the entire TP are 0.12, 0.26, 0.19, -0.11, and 0.2 m/year, respectively. These recent increases in lake level, particularly for a high percentage of salt lakes, supports accelerated glacier melting due to global warming as the most likely cause.
Project(s):
Coverage:
Median Latitude: 33.127986 * Median Longitude: 88.446092 * South-bound Latitude: 28.567210 * West-bound Longitude: 80.899580 * North-bound Latitude: 38.302450 * East-bound Longitude: 100.170000
Minimum ELEVATION: 3193.35 m a.s.l. * Maximum ELEVATION: 5115.74 m a.s.l.
Event(s):
Comment:
Data extracted in the frame of a joint ICSTI/PANGAEA IPY effort, see http://doi.pangaea.de/10.1594/PANGAEA.150150
Parameter(s):
| # | Name | Short Name | Unit | Principal Investigator | Method/Device | Comment |
|---|---|---|---|---|---|---|
| 1 | Event label | Event | ||||
| 2 | Latitude of event | Latitude | ||||
| 3 | Longitude of event | Longitude | ||||
| 4 | Lake | Lake | Zhang, Guoqing | |||
| 5 | Number | No | Zhang, Guoqing | ICESat satellite data | of ICESat tracks within no. of years | |
| 6 | Number of years | Years | a | Zhang, Guoqing | ICESat satellite data | |
| 7 | Number | No | Zhang, Guoqing | ICESat satellite data | of footprints per track, mean | |
| 8 | ELEVATION | Elevation | m a.s.l. | Geocode | ||
| 9 | Date/time start | Date/time start | Zhang, Guoqing | ICESat satellite data | ||
| 10 | Elevation 2 | Elev2 | m a.s.l. | Zhang, Guoqing | ICESat satellite data | at end |
| 11 | Date/time end | Date/time end | Zhang, Guoqing | ICESat satellite data | ||
| 12 | Standard deviation | Std dev | ± | Zhang, Guoqing | ICESat satellite data | mean |
| 13 | Water level change | WL change | m/a | Zhang, Guoqing | ICESat satellite data | |
| 14 | Lake type | Lake type | Zhang, Guoqing | F = fresh, S = salt | ||
| 15 | Sector | Sector | Zhang, Guoqing |
License:
Creative Commons Attribution 3.0 Unported (CC-BY-3.0)
Size:
814 data points