Zobrazeno 1 - 10
of 33
pro vyhledávání: '"George Leshkevich"'
Autor:
Gary L. Fahnenstiel, Robert A. Shuchman, Michael J. Sayers, Karl R. Bosse, George Leshkevich, Danna Palladino, Thomas H. Johengen, Ashley M. Burtner, Dack Stuart, Steven A. Ruberg
Publikováno v:
Journal of Great Lakes Research. 45:490-507
Lake Erie has experienced dramatic changes in water quality over the past several decades requiring extensive monitoring to assess effectiveness of adaptive management strategies. Remote sensing offers a unique potential to provide synoptic monitorin
Autor:
Michael J. Sayers, Steven A. Ruberg, George Leshkevich, Robert A. Shuchman, Amanda G. Grimm, Karl R. Bosse, Gary L. Fahnenstiel
Publikováno v:
Journal of Great Lakes Research. 45:508-521
Blooms of harmful cyanobacteria (cyanoHABs) have occurred on an annual basis in western Lake Erie for more than a decade. Previously, we developed and validated an algorithm to map the extent of the submerged and surface scum components of cyanoHABs
Autor:
Brent M. Lofgren, Xuezhi Bai, George Leshkevich, Alexandre Assuncao, Jia Wang, James Kessler, Anne H. Clites, Philip Y. Chu, John F. Bratton
Publikováno v:
Journal of Climate. 31:7249-7268
In this study, decadal variability of ice cover in the Great Lakes is investigated using historical airborne and satellite measurements from 1963 to 2017. It was found that Great Lakes ice cover has 1) a linear relationship with the Atlantic multidec
Publikováno v:
Journal of Great Lakes Research. 45:403-404
Autor:
Jia Wang, David J. Schwab, Xuezhi Bai, Lin Luo, Raymond Assel, Brent M. Lofgren, John F. Bratton, Jay A. Austin, Trudy Wohlleben, John D. Lenters, Anne H. Clites, Sean R. Helfrich, George Leshkevich, Henry A. Vanderploeg, Marie Colton
Publikováno v:
Climate Dynamics. 44:1187-1213
A record-breaking low ice cover occurred in the North American Great Lakes during winter 2011/2012, in conjunction with a strong positive Arctic Oscillation/North Atlantic Oscillation (+AO/NAO) and a La Nina event. Large-scale atmosphere circulation
Publikováno v:
Journal of Geophysical Research: Oceans. 118:4286-4304
[1] Interannual variability of ice cover, circulation, and thermal structure in Lake Erie for 2003–2012 was investigated using a three-dimensional hydrodynamic model coupled with ice processes. The model reproduced minima of ice extent in the winte
Publikováno v:
Ocean Modelling. 65:40-63
An unstructured Finite Volume Coastal Ocean Model was applied to all five Great Lakes simultaneously to simulate circulation and thermal structure from 1993 to 2008. Model results are compared to available observations of currents and temperature and
Autor:
Colin N. Brooks, Thomas H. Johengen, George Leshkevich, Robert A. Shuchman, Michael J. Sayers, Dmitry Pozdnyakov
Publikováno v:
Journal of Great Lakes Research. 39:14-33
An algorithm that utilizes individual lake hydro-optical (HO) models has been developed for the Great Lakes that uses SeaWiFS, MODIS, or MERIS satellite data to estimate concentrations of chlorophyll, dissolved organic carbon, and suspended minerals.
Publikováno v:
Journal of Great Lakes Research. 39:46-54
A new MODIS based satellite algorithm to estimate primary production (PP) has been generated and evaluated for Lake Michigan. The Great Lakes Primary Productivity Model (GLPPM) is based on previous models that required extensive in situ data but it c
Publikováno v:
Journal of Great Lakes Research. 36:736-746
In situ measurements of inherent (IOPs) and apparent optical properties (AOPs), along with laboratory measurements of optically active constituents, were made at sites (n = 14) in western Lake Erie following a wind event to advance the characterizati