The contribution of TOPEX/POSEIDON to the global monitoring of climatically sensitive lakes

Remote sensing and long-term monitoring of closed and climatically sensitive open lakes can provide useful information for the study of climatic change. Satellite radar altimetry offers the advantages of day/night and all-weather capability in the production of relative lake level changes on a global scale. A simple technique which derives relative lake level changes is described with specific relevance to the TOPEX/POSEIDON geophysical data record data set. An assessment of the coverage and global tracking performance of both the NASA radar altimeter and the solid state altimeter over these lakes is discussed, and results are presented for the first 1.75 years of the mission. Lake level time series were acquired for 12 closed lakes, six open lakes, and three reservoirs, providing information in many cases where ground gauge data are unobtainable or the lake is inaccessible. The results, accurate to ∼4 cm rms, mark the beginning of a very accurate lake level data set, showing that TOPEX/POSEIDON can successfully contribute to the long-term global program.

[1]  E. J. Christensen,et al.  Calibration of TOPEX/POSEIDON at Platform Harvest , 1994 .

[2]  Philippe Gaspar,et al.  Global statistical analysis of TOPEX and POSEIDON data , 1994 .

[3]  A. Vincens.  Late quaternary vegetation history of the South-Tanganyika basin. Climatic implications in South Central Africa , 1991 .

[4]  P. Raizonville,et al.  Poseidon Radar Altimeter Flight Model Design and Tests Results , 1991, [Proceedings] IGARSS'91 Remote Sensing: Global Monitoring for Earth Management.

[5]  Andrew Y. Au,et al.  Analysis of altimetry over inland seas , 1990 .

[6]  D. Barber,et al.  Temporal evolution of physical and dielectric properties of sea ice and snow during the early melt season: observations from SIMS ’90 experiment , 1994, Journal of Glaciology.

[7]  Stephen K. Gill,et al.  Evaluation of the TOPEX/POSEIDON altimeter system over the Great Lakes , 1994 .

[8]  J. Kutzbach,et al.  Paleoclimatic Estimates from Water and Energy Budgets of East African Lakes , 1983, Quaternary Research.

[9]  W. Williams.  The worldwide occurrence and limnological significance of falling water-levels in large, permanent saline lakes , 1993 .

[10]  Stephen K. Gill,et al.  Variation of Great Lakes water levels derived from Geosat altimetry , 1994 .

[11]  Andrew Harris,et al.  Time series remote sensing of a climatically sensitive lake , 1994 .

[12]  T. Davies,et al.  Recent changes in the level of Lake Naivasha, Kenya, as an indicator of equatorial westerlies over East Africa , 1979 .

[13]  John L. Lillibridge,et al.  TOPEX/POSEIDON: The 2‐cm solution , 1994 .

[14]  G. S. Hayne,et al.  NASA radar altimeter for the TOPEX/POSEIDON Project , 1991, Proc. IEEE.

[15]  Brian D. Beckley,et al.  Global mesoscale variability from collinear tracks of SEASAT altimeter data , 1983 .

[16]  C. G. Rapley,et al.  The response of lake levels and areas to climatic change , 1994 .

[17]  C. Birkett,et al.  Radar altimetry: A new concept in monitoring lake level changes , 1994 .

[18]  I. Mason,et al.  Lake area measurement using AVHRR A case study , 1989 .

[19]  K. Szesztay.  WATER BALANCE AND WATER LEVEL FLUCTUATIONS OF LAKES , 1974 .

[20]  C. Rapley.  Satellite radar altimeters , 1990 .

[21]  Stewart J. Cohen.  Impacts of CO2-induced climatic change on water resources in the Great Lakes Basin , 1986 .

[22]  P. Sly.  Sedimentary Processes in Lakes , 1978 .

[23]  A. Saulesleja.  GREAT LAKES CLIMATOLOGICAL ATLAS , 1986 .

[24]  Bob E. Schutz,et al.  Precision orbit determination for TOPEX/POSEIDON , 1994 .

[25]  Jacques Stum,et al.  A comparison between TOPEX microwave radiometer, ERS 1 microwave radiometer, and European Centre for Medium-Range Weather Forecasting derived wet tropospheric corrections , 1994 .

[26]  Julius Goldhirsh,et al.  Altimeter height measurement error introduced by the presence of variable cloud and rain attenuation , 1986 .

[27]  G. W. Kite,et al.  Recent changes in level of Lake Victoria / Récents changements enregistrés dans le niveau du Lac Victoria , 1981 .

[28]  Jeremy Morley,et al.  A comparison of the performance of the ice and ocean tracking modes of the ERS‐1 radar altimeter over non‐ocean surfaces , 1994 .

[29]  W. Langbein.  Salinity and hydrology of closed lakes , 1961 .

[30]  Christopher S. Ruf,et al.  TOPEX/POSEIDON microwave radiometer performance and in‐flight calibration , 1994 .

[31]  C. Rapley.  Satellite Rader Altimeters , 1990 .

[32]  C. Shum,et al.  Tidal corrections in the TOPEX/POSEIDON geophysical data records , 1994 .

[33]  S. Changnon.  Changes in climate and levels of lake Michigan: shoreline impacts at Chicago , 1993 .

[34]  G. Brown.  The average impulse response of a rough surface and its applications , 1977 .

[35]  H. Jay Zwally,et al.  Analysis and retracking of continental ice sheet radar altimeter waveforms , 1983 .

[36]  I. Foster,et al.  Climatic implications of recent changes in lake level at Lac Azigza (Morocco). , 1992 .

[37]  J. Allan,et al.  The Nile: Sharing a Scarce Resource. , 1996 .

[38]  George W. Platzman,et al.  The Dynamical Prediction of Wind Tides on Lake Erie , 1963 .