Zobrazeno 1 - 10
of 50
pro vyhledávání: '"Marcel Urban"'
Autor:
Mikhail Urbazaev, Laura L. Hess, Steven Hancock, Luciane Yumie Sato, Jean Pierre Ometto, Christian Thiel, Clémence Dubois, Kai Heckel, Marcel Urban, Markus Adam, Christiane Schmullius
Publikováno v:
Science of Remote Sensing, Vol 6, Iss , Pp 100067- (2022)
Accurate measurements of terrain elevation are crucial for many ecological applications. In this study, we sought to assess new global three-dimensional Earth observation data acquired by the spaceborne Light Detection and Ranging (LiDAR) missions Ic
Externí odkaz:
https://doaj.org/article/9e1eb3043bbe4c169032a0620384bf7a
Autor:
Konstantin Schellenberg, Thomas Jagdhuber, Markus Zehner, Sören Hese, Marcel Urban, Mikhail Urbazaev, Henrik Hartmann, Christiane Schmullius, Clémence Dubois
Publikováno v:
Remote Sensing, Vol 15, Iss 4, p 1004 (2023)
Understanding forest decline under drought pressure is receiving research attention due to the increasing frequency of large-scale heat waves and massive tree mortality events. However, since assessing mortality on the ground is challenging and costl
Externí odkaz:
https://doaj.org/article/c089f604ac5745e7b934d041bf236cd7
Autor:
Kai Heckel, Marcel Urban, Jean-Sébastien Bouffard, Jussi Baade, Peter Boucher, Andrew Davies, Evan G. Hockridge, Wolfgang Lück, Jonas Ziemer, Izak Smit, Bernhard Jacobs, Mark Norris-Rogers, Christiane Schmullius
Publikováno v:
Koedoe: African Protected Area Conservation and Science, Vol 63, Iss 1, Pp e1-e13 (2021)
The use of digital elevation models has proven to be crucial in numerous studies related to savanna ecosystem research. However, the insufficient spatial resolution of the chosen input data is often considered to be a limiting factor when conducting
Externí odkaz:
https://doaj.org/article/ba35f42a157f4eb2b44c64d8f15ffbab
Autor:
Marcel Urban, Kai Heckel, Christian Berger, Patrick Schratz, Izak P.J. Smit, Tercia Strydom, Jussi Baade, Christiane Schmullius
Publikováno v:
Koedoe: African Protected Area Conservation and Science, Vol 62, Iss 1, Pp e1-e6 (2020)
The savanna ecosystems in South Africa, which are predominantly characterised by woody vegetation (e.g. shrubs and trees) and grasslands with annual phenological cycles, are shaped by ecosystem processes such as droughts, fires and herbivory interact
Externí odkaz:
https://doaj.org/article/fc1796b35f4b43349f2da8806e35073b
Autor:
Hilma S. Nghiyalwa, Marcel Urban, Jussi Baade, Izak P. J. Smit, Abel Ramoelo, Buster Mogonong, Christiane Schmullius
Publikováno v:
Remote Sensing, Vol 13, Iss 19, p 3870 (2021)
Reliable estimates of savanna vegetation constituents (i.e., woody and herbaceous vegetation) are essential as they are both responders and drivers of global change. The savanna is a highly heterogenous biome with high variability in land cover types
Externí odkaz:
https://doaj.org/article/46bd3c96c865451cac59d2364ff6cf2d
Autor:
Marcel Urban, Konstantin Schellenberg, Theunis Morgenthal, Clémence Dubois, Andreas Hirner, Ursula Gessner, Buster Mogonong, Zhenyu Zhang, Jussi Baade, Anneliza Collett, Christiane Schmullius
Publikováno v:
Remote Sensing, Vol 13, Iss 17, p 3342 (2021)
Increasing woody cover and overgrazing in semi-arid ecosystems are known to be the major factors driving land degradation. This study focuses on mapping the distribution of the slangbos shrub (Seriphium plumosum) in a test region in the Free State Pr
Externí odkaz:
https://doaj.org/article/4a5efabe3c6e44acabab0ae428113d7e
Publikováno v:
Remote Sensing, Vol 12, Iss 2, p 302 (2020)
The fusion of microwave and optical data sets is expected to provide great potential for the derivation of forest cover around the globe. As Sentinel-1 and Sentinel-2 are now both operating in twin mode, they can provide an unprecedented data source
Externí odkaz:
https://doaj.org/article/f7c0b51c816e44288235fced32f2f7ba
Autor:
Marcel Urban, Matthias Forkel, Jonas Eberle, Christian Hüttich, Christiane Schmullius, Martin Herold
Publikováno v:
Remote Sensing, Vol 6, Iss 3, Pp 2296-2316 (2014)
Arctic ecosystems have been afflicted by vast changes in recent decades. Changes in temperature, as well as precipitation, are having an impact on snow cover, vegetation productivity and coverage, vegetation seasonality, surface albedo, and permafros
Externí odkaz:
https://doaj.org/article/e4e3781755b24f3b8b76b6f49dd84087
Publikováno v:
Remote Sensing, Vol 5, Iss 5, Pp 2348-2367 (2013)
Satellite-based temperature measurements are an important indicator for global climate change studies over large areas. Records from Moderate Resolution Imaging Spectroradiometer (MODIS), Advanced Very High Resolution Radiometer (AVHRR) and (Advanced
Externí odkaz:
https://doaj.org/article/f7ffc21ba6484680852fe7beb28d1116
Autor:
Marcel Urban, Christian Berger, Tami E. Mudau, Kai Heckel, John Truckenbrodt, Victor Onyango Odipo, Izak P. J. Smit, Christiane Schmullius
Publikováno v:
Remote Sensing, Vol 10, Iss 9, p 1482 (2018)
During the southern summer season of 2015 and 2016, South Africa experienced one of the most severe meteorological droughts since the start of climate recording, due to an exceptionally strong El Niño event. To investigate spatiotemporal dynamics of
Externí odkaz:
https://doaj.org/article/7d47af1da5d34a39a56599a1cc9efb33