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Evaluation of the Surface Water Distribution in North-Central Namibia Based on MODIS and AMSR Series

Hiroki Mizuochi, Tetsuya Hiyama, Takeshi Ohta, Kenlo Nasahara
2014 Remote Sensing  
Evaluating the distribution of surface water would reveal the area potentially suitable for rice cultivation.  ...  In this study, we detected the distribution of surface water with high spatial and temporal resolution by using two types of complementary satellite data: MODIS (MODerate-resolution Imaging Spectroradiometer  ...  Niipele, and all members of the Faculty of Agriculture and Natural Resources, University of Namibia (UNAM) for their support during our field survey.  ... 
doi:10.3390/rs6087660 fatcat:ytkwakyvtzf47kp5pzvcckvupi

Analysing the origin of rain- and subsurface water in seasonal wetlands of north-central Namibia

Tetsuya Hiyama, Hironari Kanamori, Jack R Kambatuku, Ayumi Kotani, Kazuyoshi Asai, Hiroki Mizuochi, Yuichiro Fujioka, Morio Iijima
2017 Environmental Research Letters  
Acknowledgments This study was supported by the Science and Technology Research Partnership for Sustainable Development (SATREPS) of the Japan Science and Technology Agency (JST) and the Japan International  ...  We thank all members of the Faculty of Agriculture and Natural Resources of UNAM for their support during our field survey.  ...  Conclusions This study evaluated the origin of rainwater and subsurface waters in small wetlands of the CSSWs of north-central Namibia.  ... 
doi:10.1088/1748-9326/aa5bc8 fatcat:u2cct6pamre5pd6aqklp5ztmvu

Spatiotemporal Change Analysis of Soil Moisture Based on Downscaling Technology in Africa

Zijin Yuan, Nusseiba NourEldeen, Kebiao Mao, Zhihao Qin, Tongren Xu
2022 Water  
However, the lack of continuous and stable long-term series and high-resolution soil moisture records impedes such research.  ...  The most significant decrease in SM was observed in the savanna zone (slope < −0.08 m3 m−3 and P < 0.001), followed by South Africa and Namibia (slope < −0.07 m3 m−3 and P < 0.01).  ...  The authors are grateful to two anonymous reviewers for their constructive comments and suggestions on this manuscript.  ... 
doi:10.3390/w14010074 fatcat:kolx62wb4reztplj7ntbmamqqe

Subsurface emission effects in AMSR-E measurements: Implications for land surface microwave emissivity retrieval

John F. Galantowicz, Jean-Luc Moncet, Pan Liang, Alan E. Lipton, Gennady Uymin, Catherine Prigent, Christopher Grassotti
2011 Journal of Geophysical Research  
The AMSR-E orbit has equator crossing times near 01:30 and 13:30 local time, resulting in sampling when near-surface temperature gradients are likely to be large and amplifying the influence of emission  ...  1] An analysis of land surface microwave emission time series shows that the characteristic diurnal signatures associated with subsurface emission in sandy deserts carry over to arid and semiarid regions  ...  The process tested indicators of cloudiness in the swath data based on the MODIS LST quality flags and quality control tests for AMSR-E footprints and temporally and spatially interpolated International  ... 
doi:10.1029/2010jd015431 fatcat:ngixzcezhnf53lzvtmcjpswj4i

An All-Weather Land Surface Temperature Product Based on MSG/SEVIRI Observations

João P. A. Martins, Isabel F. Trigo, Nicolas Ghilain, Carlos Jimenez, Frank-M. Göttsche, Sofia L. Ermida, Folke-S. Olesen, Françoise Gellens-Meulenberghs, Alirio Arboleda
2019 Remote Sensing  
It is the first all-weather LST product based on visible and infrared observations combining clear-sky LST retrieved from the Spinning Enhanced Visible and Infrared Imager on Meteosat Second Generation  ...  The validation against in-situ LST indicates an accuracy of the new product between -0.8 K and 1.1 K and a precision between 1.0 K and 1.4 K, generally showing a better performance than the MW product.  ...  The work at RMI has been funded by EUMETSAT and the European Space Agency through the PRODEX programme of the Belgian Science Policy.  ... 
doi:10.3390/rs11243044 fatcat:keo4nk5ewnd7ddpu6ln655tvhi

Observation of ENSO linked changes in the tropical Atlantic cloud vertical distribution using 14 years of MODIS observations

Nils Madenach, Cintia Carbajal Henken, René Preusker, Odran Sourdeval, Jürgen Fischer
2019 Atmospheric Chemistry and Physics Discussions  
In terms of linear changes, two major phases (before and after November 2011) in the time-series of the TAO domain-average Cloud Top Height (CTH) and High Cloud Fraction (HCF) can be distinguished.  ...  </strong> 14 years (September 2002 to September 2016) of Aqua Moderate Resolution Imaging Spectroradiometer (MODIS) monthly mean cloud data is analyzed to identify possible changes of the cloud vertical  ...  Further more we analyzed the level 3 monthly mean Sea Surface Temperature (SST) and Total Column of Water Vapor (TCWV) from Advanced Microwave Scanning Radiometer - Earth Observing System (AMSR-E  ... 
doi:10.5194/acp-2018-1136 fatcat:ty4234i6kvchjkzu4hwweemvpa

Large simulated radiative effects of smoke in the south-east Atlantic

Hamish Gordon, Paul R. Field, Steven J. Abel, Ben T. Johnson, Mohit Dalvi, Daniel P. Grosvenor, Adrian A. Hill, Annette K. Miltenberger, Masaru Yoshioka, Ken S. Carslaw
2018 Atmospheric Chemistry and Physics Discussions  
aerosol direct effect and the effect of the aerosol on cloud albedo.  ...  Furthermore, we simulate a liquid water path that is biased high compared to satellite observations by 22<span class="thinspace"></span>% on average, and this leads to high estimates of the domain-averaged  ...  For liquid water path we can also compare MODIS and SEVIRI with AMSR-2, in pixels defined as cloudy (here, LWP > 10 g m −2 ), on the coarser AMSR-2 grid.  ... 
doi:10.5194/acp-2018-305 fatcat:phi5xktq4bdmben6wi3nwwap7y

Large simulated radiative effects of smoke in the south-east Atlantic

Hamish Gordon, Paul R. Field, Steven J. Abel, Mohit Dalvi, Daniel P. Grosvenor, Adrian A. Hill, Ben T. Johnson, Annette K. Miltenberger, Masaru Yoshioka, Ken S. Carslaw
2018 Atmospheric Chemistry and Physics  
aerosol direct effect and the effect of the aerosol on cloud albedo.  ...  The microphysical and dynamical changes lead to an increase in liquid water path of 60 g m<sup>−2</sup> relative to a simulation without smoke aerosol, when averaged over the polluted period.  ...  AMSR data are produced by Remote Sensing Systems and were sponsored by the NASA AMSR-E Science Team and the NASA Earth Science MEa-SUREs Program.  ... 
doi:10.5194/acp-18-15261-2018 fatcat:cm3o7kfg5nbqpiwtuqpavir6uy

Characteristics of cloud liquid water path from SEVIRI onboard the Meteosat Second Generation 2 satellite for several cloud types

A. Kniffka, M. Stengel, M. Lockhoff, R. Bennartz, R. Hollmann
2014 Atmospheric Measurement Techniques  
</strong> In this study the temporal and spatial characteristics of the liquid water path (LWP) of low, middle and high level clouds are analysed using space-based observations from the Spinning Enhanced  ...  These frequency distributions are constant with time in the entire SEVIRI field of view, but vary for smaller regions like Central Europe.  ...  This work was carried out within the framework of EUMETSAT's Satellite Application Facility on Climate Monitoring (CM SAF) in cooperation with the national meteorological institutes of Germany, Sweden,  ... 
doi:10.5194/amt-7-887-2014 fatcat:5m46lttwobdkbjeee4ftvessfe

A Review of Wetland Remote Sensing

Meng Guo, Jing Li, Chunlei Sheng, Jiawei Xu, Li Wu
2017 Sensors  
Wetlands are some of the most important ecosystems on Earth. They play a key role in alleviating floods and filtering polluted water and also provide habitats for many plants and animals.  ...  This study also gives an overview of the methods used in wetland research such as supervised and unsupervised classification and decision tree and object-based classification.  ...  System (AMSR-E) in North-Central Namibia.  ... 
doi:10.3390/s17040777 pmid:28379174 pmcid:PMC5422050 fatcat:ddyxyf44o5ejjnnjwyjp7kjyqy

Mapping gains and losses in woody vegetation across global tropical drylands

Feng Tian, Martin Brandt, Yi Y. Liu, Kjeld Rasmussen, Rasmus Fensholt
2016 Global Change Biology  
Example of the conceptual design based on simulated data.614Fig. S2. Location of the in situ sites.  ...  The data is consistent among sensors as evaluated in Tian et al. (2016).  ... 
doi:10.1111/gcb.13464 pmid:27515022 fatcat:amjmdcjmobfxdmiturk4kjufc4

Spatial evapotranspiration, rainfall and land use data in water accounting – Part 1: Review of the accuracy of the remote sensing data

P. Karimi, W. G. M. Bastiaanssen
2015 Hydrology and Earth System Sciences  
Water accounting needs accurate input data for adequate descriptions of water distribution and water depletion in river basins.  ...  Water accounting and distributed hydrological models are examples of such tools.  ...  Funds for this research were provided by the CGIAR Research Programme on Water, Land and Ecosystems. Edited by: B. van den Hurk  ... 
doi:10.5194/hess-19-507-2015 fatcat:akyrf4fr7zanhcatmzrkaoutrq

A Global Climatology of Surface Wind and Wind Stress Fields from Eight Years of QuikSCAT Scatterometer Data

Craig M. Risien, Dudley B. Chelton
2008 Journal of Physical Oceanography  
This is particularly true of the wind stress derivative fields in which topographic, SST gradient, and ocean current influences on surface winds are plainly visible.  ...  While this atlas, referred to here as the Scatterometer Climatology of Ocean Winds (SCOW), consists of 12 variables, the focus here is on the wind stress and wind stress derivative (curl and divergence  ...  We thank two reviewers and Carl Wunsch for comments that improved the manuscript. We also thank Michael Schlax for QuikSCAT dataprocessing support.  ... 
doi:10.1175/2008jpo3881.1 fatcat:qbvek4mdmfetraboyif37q7a74

Global Climate

Robert J. H. Dunn, F. Aldred, Nadine Gobron, John B. Miller, Kate M. Willett, M. Ades, Robert Adler, Richard, P. Allan, Rob Allan, J. Anderson, Anthony Argüez, C. Arosio (+163 others)
2021 Bulletin of The American Meteorological Society - (BAMS)  
Africa experienced decreased cloudiness in the south over Namibia and South Africa and in the north over Libya, Tunisia, and Algeria.  ...  In the evaluation of the long-term trends in NMAT and SST, differences in spatial coverage may have a large influence on the results (Jones 2020) .  ... 
doi:10.1175/bams-d-21-0098.1 fatcat:pkoben2dorcmngmr2wwk6wtmfa

Global Climate

M. Ades, R. Adler, Rob Allan, R. P. Allan, J. Anderson, Anthony Argüez, C. Arosio, J. A. Augustine, C. Azorin-Molina, J. Barichivich, J. Barnes, H. E. Beck (+167 others)
2020 Bulletin of The American Meteorological Society - (BAMS)  
the sum of groundwater, soil water, surface water, snow, and ice, as an equivalent height of water in cm) between 2018 and 2019, based on output from a GRACE and GRACE-FO data-assimilating land surface  ...  (a) Time series of vertical profiles of tropical (15°N-15°S) SWV anomalies and (b) latitudinal distributions of SWV anomalies at 82 hPa. Both are based on Aura MLS data.  ...  The European Centre for Medium-Range Weather Forecast (ECMWF) operates CAMS on behalf of the European Commission.  ... 
doi:10.1175/bams-d-20-0104.1 fatcat:3pjande5xzampgyykbhbh7scki
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