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Seasonal Climatology of Surface Energy Fluxes on the Great Lakes

By Lofgren, Brent M.

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Book Id: WPLBN0000661737
Format Type: PDF eBook
File Size: 2.71 MB.
Reproduction Date: 2005

Title: Seasonal Climatology of Surface Energy Fluxes on the Great Lakes  
Author: Lofgren, Brent M.
Volume:
Language: English
Subject: Science., Ecology & environment, National Oceanic and Atmospheric Administration (U.S.)
Collections: National Oceanographic Data Center
Historic
Publication Date:
Publisher: Government Reference Publication

Citation

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Lofgren, B. M. (n.d.). Seasonal Climatology of Surface Energy Fluxes on the Great Lakes. Retrieved from http://www.hawaiilibrary.com/


Excerpt
Excerpt: SEASONAL CLIMATOLOGY OF SURFACE ENERGY FLUXES ON THE GREAT LAKES. We estimate the seasonal cycle of latent, sensible, and net heat flux from the surface of the Great Lakes, using lake surface temperatures derived from the NOAA/AVHRR satellite instrument, along with meteorological data from surface station observations. Several well-known features are evident. Among these are very high outgoing fluxes of latent and sensible heat during the late fall and early winter, which drive strong cooling of the lakes, and greater seasonal variation of surface temperature and fluxes in shallower waters. Due to strong static stability of the overlying atmospheric boundary layer during the spring, both the magnitude and the spatial variation of latent and sensible heat flux are small during the spring season, and to a lesser degree the summer. The annual cycles of latent and sensible heat flux over the Great Lakes are opposite in phase to the same fluxes over land, indicating a large exchange of energy via atmospheric advection between the lake and land surfaces. A major weakness of the method used here is that heat fluxes are calculated on the basis of an ice-free surface, making the derived fluxes for January through March suspect.

Table of Contents
CONTENTS Page ABSTRACT ............................................................................................................................. 5 1. INTRODUCTION ............................................................................................................... 5 2. METHOD ............................................................................................................................ 6 3. INPUT DATA ..................................................................................................................... 8 4. RESULTS ............................................................................................................................ 8 5. CONCLUSIONS ............................................................................................................... 10 6. ACKNOWLEDGEMENTS............................................................................................... 11 7. REFERENCES .................................................................................................................. 11 TABLES Table 1. Latent heat flux (W m-2) averaged over each lake .................................................... 13 Table 2. Sensible heat flux (W m-2) averaged over each lake ................................................. 13 Table 3. Net heat flux (W m-2) averaged over each lake ........................................................ 14 FIGURES Figure 1. The distribution of stations from which meterological data are available .............. 15 Figure 2. The spatial distribution of latent heat flux (W m-2) over the Great Lakes .............. 16 Figure 3. The spatial distribution of sensible heat flux (W m-2) over the Great Lakes .......... 18 Figure 4. The spatial distribution of net heat flux (W m-2) over the Great Lakes .................. 20

 

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