Sökning: id:"swepub:oai:research.chalmers.se:03976b70-c0bc-44bf-9962-895b1f5e28ad" >
On the Sensitivity ...
On the Sensitivity of TanDEM-X-Observations to Boreal Forest Structure
-
- Askne, Jan, 1936 (författare)
- Chalmers tekniska högskola,Chalmers University of Technology
-
- Persson, Henrik (författare)
- Swedish University of Agricultural Sciences,Sveriges lantbruksuniversitet,Institutionen för skoglig resurshushållning,Department of Forest Resource Management,Sveriges lantbruksuniversitet (SLU),Swedish University of Agricultural Sciences (SLU)
-
- Ulander, Lars, 1962 (författare)
- Chalmers tekniska högskola,Chalmers University of Technology
-
(creator_code:org_t)
-
- 2019-07-10
- 2019
- Engelska.
-
Ingår i: Remote Sensing. - : MDPI AG. - 2072-4292. ; 11:14
- Relaterad länk:
-
https://research.cha... (primary) (free)
-
visa fler...
-
https://www.mdpi.com...
-
https://research.cha...
-
https://research.cha...
-
https://doi.org/10.3...
-
https://res.slu.se/i...
-
visa färre...
Abstract
Ämnesord
Stäng
- The structure of forests is important to observe for understanding coupling to global dynamics of ecosystems, biodiversity, and management aspects. In this paper, the sensitivity of X-band to boreal forest stem volume and to vertical and horizontal structure in the form of forest height and horizontal vegetation density is studied using TanDEM-X satellite observations from two study sites in Sweden: Remningstorp and Krycklan. The forest was analyzed with the Interferometric Water Cloud Model (IWCM), without the use of local data for model training, and compared with measurements by Airborne Lidar Scanning (ALS). On one hand, a large number of stands were studied, and in addition, plots with different types of changes between 2010 and 2014 were also studied. It is shown that the TanDEM-X phase height is, under certain conditions, equal to the product of the ALS quantities for height and density. Therefore, the sensitivity of phase height to relative changes in height and density is the same. For stands with a phase height >5 m we obtained an root-mean-square error, RMSE, of 8% and 10% for tree height in Remningstorp and Krycklan, respectively, and for vegetation density an RMSE of 13% for both. Furthermore, we obtained an RMSE of 17% for estimation of above ground biomass at stand level in Remningstorp and in Krycklan. The forest changes estimated with TanDEM-X/IWCM and ALS are small for all plots except clear cuts but show similar trends. Plots without forest management changes show a mean estimated height growth of 2.7% with TanDEM-X/IWCM versus 2.1% with ALS and a biomass growth of 4.3% versus 4.2% per year. The agreement between the estimates from TanDEM-X/IWCM and ALS is in general good, except for stands with low phase height.
Ämnesord
- LANTBRUKSVETENSKAPER -- Lantbruksvetenskap, skogsbruk och fiske -- Skogsvetenskap (hsv//swe)
- AGRICULTURAL SCIENCES -- Agriculture, Forestry and Fisheries -- Forest Science (hsv//eng)
- NATURVETENSKAP -- Geovetenskap och miljövetenskap -- Naturgeografi (hsv//swe)
- NATURAL SCIENCES -- Earth and Related Environmental Sciences -- Physical Geography (hsv//eng)
- NATURVETENSKAP -- Geovetenskap och miljövetenskap -- Klimatforskning (hsv//swe)
- NATURAL SCIENCES -- Earth and Related Environmental Sciences -- Climate Research (hsv//eng)
- TEKNIK OCH TEKNOLOGIER -- Naturresursteknik -- Fjärranalysteknik (hsv//swe)
- ENGINEERING AND TECHNOLOGY -- Environmental Engineering -- Remote Sensing (hsv//eng)
Nyckelord
- ALS
- phase height
- vegetation density
- TanDEM-X
- change detection
- height
- above ground biomass (AGB)
- penetration depth
Publikations- och innehållstyp
- art (ämneskategori)
- ref (ämneskategori)
Hitta via bibliotek
Till lärosätets databas