Filters








28 Hits in 9.0 sec

Long-Term Temporal and Spatial Monitoring of Cladophora Blooms in Qinghai Lake Based on Multi-Source Remote Sensing Images

Hongyu Duan, Xiaojun Yao, Dahong Zhang, Huian Jin, Qixin Wei
2022 Remote Sensing  
The correlation between the meteorological factors and the changes in FCBs was weak, but the increase in flooded pastures in the BRN region (Bird Island) due to rising water levels was definitely responsible  ...  The results show that the general change trend of FCBs in Qinghai Lake featured starting in May, expanding rapidly from June to August, and increasing steadily from September to October.  ...  Acknowledgments: The authors would like to thank staff in Qinghai Lake Nature Reserve Administration for great help in conducting field work.  ... 
doi:10.3390/rs14040853 fatcat:img75fcmsngrlghwsnzlap26g4

An Integrated Field and Hyperspectral Remote Sensing Method for the Estimation of Pigments Content of Stipa Purpurea in Shenzha, Tibet

Bo Kong, Bing He, Huan Yu, Yu Liu
2017 Mathematical Problems in Engineering  
The results show that (1) there are significant correlations between chlorophyll content and spectral variables; in particular, the coefficient of Chlb in Stipa purpurea with RVI is the largest (0.728)  ...  is slightly more than Chlb; (5) the distribution of Chla is opposite to Chlb and Chls content in water area.  ...  steppe region with low soil water content, and the change of the pigment in the lake and water was small.  ... 
doi:10.1155/2017/4787054 fatcat:yf5hqd5jjbgnnmkopbqtxsobpy

Inland Water Atmospheric Correction Based on Turbidity Classification Using OLCI and SLSTR Synergistic Observations

Shun Bi, Yunmei Li, Qiao Wang, Heng Lyu, Ge Liu, Zhubin Zheng, Chenggong Du, Meng Mu, Jie Xu, Shaohua Lei, Song Miao
2018 Remote Sensing  
Among the inland lakes, the reflectance of the relatively clean waters such as Lake Fuxian is close to zero after 800 nm, while in some turbid waters, the reflectance is non-zero even after 1000 nm [30  ...  For example, the concentration of total suspended matter (TSM), which is considered as an essential indicator of lake turbidity [27] , is approximately 1.24 mg/L in Lake Fuxian [28] .  ...  2 products; HYGEOS for providing the Polymer v4.8 software; the members of the cruises over Lake Erhai, Lake Hongze, and Lake Taihu for their hard work; and Xiaolei Ding, Ling Zhou, and Tianlin Hong for  ... 
doi:10.3390/rs10071002 fatcat:ecb2pq34nvedfg5f2id6tsuxl4

Trophic state assessment of global inland waters using a MODIS-derived Forel-Ule index

Shenglei Wang, Junsheng Li, Bing Zhang, Evangelos Spyrakos, Andrew N. Tyler, Qian Shen, Fangfang Zhang, Tiit Kuster, Moritz K. Lehmann, Yanhong Wu, Dailiang Peng
2018 Remote Sensing of Environment  
such as chlorophyll-a (Chl-a).  ...  In this study, we 20 developed a new RS approach to assess the trophic state of global inland water bodies 21 based on Moderate Resolution Imaging Spectroradiometer (MODIS) imagery and the 22 Forel-Ule  ...  high mountains and 488 plateau regions of Central Asia (Qinghai-Tibet Plateau region) and southern South 489 America (Patagonia Plateau region), while eutrophic large lakes concentrated in central 490  ... 
doi:10.1016/j.rse.2018.08.026 fatcat:poxvcgmwpjhmbegjjxkimclcgm

A systematic examination of the relationship between CDOM and DOC for various inland waters across China

Kaishan Song, Ying Zhao, Zhidan Wen, Jianhang Ma, Tiantian Shao, Chong Fang, Yingxin Shang
2016 Hydrology and Earth System Sciences Discussions  
In the current investigation, samples from fresh lakes, saline lakes, rivers or streams, urban water bodies, ice-covered lakes were examined.  ...  However, the relationship between DOC and a<sub>CDOM</sub>(275) and a<sub>CDOM</sub>(295) for different types of inland waters are still not clear.  ...  Acknowledgements 436 The authors would like to thank financial supports from Natural Science Foundation 437 of China (No.41471290), and "One Hundred Talents" Program from Chinese 438 Hydrol.  ... 
doi:10.5194/hess-2016-380 fatcat:era2nyqnszdndhdmli7pkwarje

Subpixel Mapping of Surface Water in the Tibetan Plateau with MODIS Data

Chenzhou Liu, Jiancheng Shi, Xiuying Liu, Zhaoyong Shi, Ji Zhu
2020 Remote Sensing  
At the regional scale, the MODIS water fraction map in October 2014 matches well with the TP lake data set and the Global Lake and Wetland Database (GLWD) in both latitudinal and longitudinal distribution  ...  The lake area estimation is more consistent with the reference TP lake data set (difference of −3.15%) than the MODIS Land Water Mask (MOD44W) (difference of −6.39%).  ...  /), the ESA surface water product was accessed in Google Earth Engine (GEE) and the TP lake data set and the GLWD are freely available at https://figshare.com/articles/Data_TPLakes/3145369 and https://  ... 
doi:10.3390/rs12071154 fatcat:jan2ckuy7vcwbi4o6rx5rygmvy

Authigenic formation of Ca–Mg carbonates in the shallow alkaline Lake Neusiedl, Austria

Dario Fussmann, Avril Jean Elisabeth von Hoyningen-Huene, Andreas Reimer, Dominik Schneider, Hana Babková, Robert Peticzka, Andreas Maier, Gernot Arp, Rolf Daniel, Patrick Meister
2020 Biogeosciences  
The bacterial community composition reflects the zonation indicated by the pore water chemistry, with a distinct increase in fermentative taxa below 15 cm core depth.  ...  To trace potential dolomite formation or diagenetic alteration processes in its deposits, lake water samples and sediment cores were analyzed with respect to sediment composition, hydrochemistry and bacterial  ...  We also thank Erich Draganits, Regina and Rudolf Krachler, and Stephanie Neuhuber for insightful discussions.  ... 
doi:10.5194/bg-17-2085-2020 fatcat:i74rs7tcpjcgxeisuhfl5bf4ni

Progress in Hyperspectral Remote Sensing Science and Technology in China Over the Past Three Decades

Qingxi Tong, Yongqi Xue, Lifu Zhang
2014 IEEE Journal of Selected Topics in Applied Earth Observations and Remote Sensing  
in HRS data, allowing them to meet the demands of both common users and researchers in the scientific community.  ...  Applications of hyperspectral imaging in China have been also performed including mineral exploration in the Qilian Mountains and oil exploration in Xinjiang province.  ...  This method effectively retrieved the chlorophyll-a concentration in highly turbid, hyper-eutrophic inland waters. Sun et al. used hyperspectral data to estimate the chlorophyll-a in Lake Taihu.  ... 
doi:10.1109/jstars.2013.2267204 fatcat:yu4pp5zyqzhafa4ec7m3vva7xi

Ecology of aerobic anoxygenic phototrophs in aquatic environments

Michal Koblížek, Corina Brussaard
2015 FEMS Microbiology Reviews  
One sentence summary: The review covers current knowledge about the distribution and diversity of aerobic anoxygenic phototrophs in aquatic environments and their role in the aquatic food webs and the  ...  Aside from cyanobacteria and proteorhodopsin-containing bacteria, aerobic anoxygenic phototrophic (AAP) bacteria are the third most numerous group of phototrophic prokaryotes in the ocean.  ...  Kirchman, Dr Yonghui Zeng, Dr Isabel Ferrera and the anonymous reviewers for their valuable comments and suggestions on this text.  ... 
doi:10.1093/femsre/fuv032 pmid:26139241 fatcat:6v4ockegknhb7ntbvtxzlgngw4

Satellite Detection of Surface Water Extent: A Review of Methodology

Jiaxin Li, Ronghua Ma, Zhigang Cao, Kun Xue, Junfeng Xiong, Minqi Hu, Xuejiao Feng
2022 Water  
Water is an imperative part of the Earth and an essential resource in human life and production.  ...  These methods were applied to the Huai River Basin in China and Nam Co on the Qinghai-Tibet Plateau. The extraction results show that all the aforementioned approaches can obtain reliable results.  ...  This research is supported by Lake-Watershed Science Data Center (http://lake.geodata.cn, accessed on 16 January 2022), National Earth System Science Data Center, and the 14th Five-year Network Security  ... 
doi:10.3390/w14071148 fatcat:p74da2jrffgrfduxqwbtinalaq

An overview of MATISSE-v2.0

Luc Labarre, Karine Caillault, Sandrine Fauqueux, Claire Malherbe, Antoine Roblin, Bernard Rosier, Pierre Simoneau, Karin Stein, John D. Gonglewski
2010 Optics in Atmospheric Propagation and Adaptive Systems XIII  
The symposium, like our other conferences and activities, would not be possible without the dedicated contribution of our participants and members.  ...  SPIE would like to express its deepest appreciation to the symposium chairs, conference chairs, Programme committees, and session chairs who have so generously given of their time and advice to make this  ...  This gives us a background correlation that we use as reference to subtract from the spatial correlation in both image and far-field measurements.  ... 
doi:10.1117/12.868183 fatcat:5anlqspzzzcftfufaxvlr45zve

Evaporitic source rocks: mesohaline responses to cycles of "famine or feast" in layered brines [chapter]

John K. Warren
2012 Quaternary carbonate and evaporite sedimentary facies and their ancient analogues  
Accumulations of organic matter can occur in any layered brine lake or epeiric seaway when an upper less-saline water mass forms on top of nutrient-rich brines, or in wet mudflats wherever waters freshen  ...  Organic matter in modern saline systems tends to accumulate in bottom sediments beneath a density-stratified mass of saline water where layered hydrologies are subject to oscillations in salinity and brine  ...  (B) Absorption spectra of the chlorophylls, b-carotene and phycobilisomes (phycoerythrin in dominant in blue-coloured cyanobacteria and phycocyanin in redcoloured cyanobacteria.  ... 
doi:10.1002/9781444392326.ch16 fatcat:knbcsbalvbh7li5bysr2jwiksq

EUCOP4 Book of Abstracts [article]

Gonçalo Vieira, Pedro Pina, Carla Mora, António Correia
2014 Zenodo  
The high quality of the scientific program is to be thanked to the authors and also to the chairs of the 23 thematic sessions, that made a fantastic work in their promotion and also in conducting all reviewing  ...  EUCOP4, the 4th European Conference on Permafrost and Regional Conference of the International Permafrost Association is hosted by the Portuguese Universities of Lisbon and Évora and is to be held in Évora  ...  This enables us to explore the spatial distribution of frost cracking in realistic landscapes, and to study the slow feedbacks between periglacial erosion, sediment transport, and the evolving topography  ... 
doi:10.5281/zenodo.5532540 fatcat:ucwuntienvh7bogt77s52im7mq

The magnetic properties of Quaternary aeolian dusts and sediments, and their palaeoclimatic significance

B.A. Maher
2011 Aeolian Research  
The magnetic record for a sediment sequence may reflect changes in sediment source, and diagenetic (post-depositional) loss and/or transformation and/or gain of magnetic minerals.  ...  Magnetic measurements, sensitive even to trace concentrations of these iron minerals, can readily discriminate between different magnetic mineral assemblages, and are also relatively rapid, non sample-destructive  ...  Simon Chew and Gemma Davies assisted greatly with the diagrams. I also appreciate the patience and helpfulness of the journal editors.  ... 
doi:10.1016/j.aeolia.2011.01.005 fatcat:nxtfxn34tndqxf62sxdrwchny4

2014 Index IEEE Journal of Selected Topics in Applied Earth Observations and Remote Sensing Vol. 7

2014 IEEE Journal of Selected Topics in Applied Earth Observations and Remote Sensing  
., and Foerster, S  ...  ., +, JSTARS Aug. 2014 3402-3415 Numerical Simulation and Forecasting of Water Level for Qinghai Lake Using Multi-Altimeter Data Between 2002 and 2012.  ...  ., +, JSTARS June 2014 2619-2629 Autoregressive moving average processes Numerical Simulation and Forecasting of Water Level for Qinghai Lake Using Multi-Altimeter Data Between 2002 and 2012.  ... 
doi:10.1109/jstars.2015.2397347 fatcat:ib3tjwsjsnd6ri6kkklq5ov37a
« Previous Showing results 1 — 15 out of 28 results