State of the Lake 2009 - Tahoe Environmental Research Center ...

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Temperature ( o F) TERC.UCDAVIS.EDU 80 75 70 65 60 55 50 45 40 PHYSICAL PROPERTIES Jan−1999 Jan−2000 Jan−2001 Jan−2002 Jan−2003 TAHOE: STATE OF THE LAKE REPORT 2009 Maximum daily surface water temperature Every 15 minutes since 1999 Maximum daily surface water temperatures were similar in 2008 to the 2007 values, although summer surface water temperatures continue to show a long-term increase. Since May 1999, the highest maximum daily surface temperature was 77.99 degrees F on July 26, 2006. The lowest maximum surface water temperature was 41.02 degrees F on Feb. 25, 2008. In the last Jan−2004 Jan−2005 Jan−2006 Jan−2007 decade, the 28 lowest maximum daily surface water temperatures occurred in 2007 and 2008. This may be attributable to the deep mixing that has occurred in both these years. Jan−2008 Jan−2009 8.5
Temperature ( o F) TERC.UCDAVIS.EDU 68 67 66 65 64 63 62 61 60 PHYSICAL PROPERTIES TAHOE: STATE OF THE LAKE REPORT 2009 July average surface water temperature Since 1999 Since 1999, surface water temperature has been recorded every two minutes from four NASA/UC Davis buoys. Shown here are ten years of average surface water temperatures in the month of July when water temperatures are typically warmest. In 2008, July surface water temperature averaged 66 degrees F, 1.1 degrees warmer than in 2007. 1999 2000 2001 2002 2003 2004 2005 2006 2007 2008 8.6
Page 1 and 2: TAHOE: STATE OF THE LAKE REPORT 200
Page 3 and 4: INTRODUCTION The University of Cali
Page 5 and 6: EXECUTIVE SUMMARY (CONTINUED FROM P
Page 7 and 8: ABOUT LAKE TAHOE AND THE TAHOE BASI
Page 9 and 10: MAP OF TAHOE BASIN DATA COLLECTION
Page 11 and 12: Rainbow, Brook, Brown and Lake trou
Page 13 and 14: 100% 90% 80% 70% 60% 50% 40% 30% 20
Page 15 and 16: ASIAN CLAM Asian Clam Excretion Exp
Page 17 and 18: ASIAN CLAM Asian Clam Size Distribu
Page 19 and 20: Temperature ( o F) 60 55 50 35 30 M
Page 21 and 22: Temperature ( o F) 70 60 50 40 30 2
Page 23 and 24: Inches 70 60 50 40 30 20 10 0 METEO
Page 25 and 26: Percent 80 70 60 50 40 30 20 10 0 M
Page 27 and 28: PHYSICAL PROPERTIES TERC.UCDAVIS.ED
Page 29 and 30: Feet 6232 6230 6228 6226 6224 6222
Page 31: Temperature ( o F) TERC.UCDAVIS.EDU
Page 35 and 36: Density Difference (kilograms per c
Page 37 and 38: Mean daily streamflow (cubic feet p
Page 39 and 40: NUTRIENTS AND PARTICLES TERC.UCDAVI
Page 41 and 42: TERC.UCDAVIS.EDU NUTRIENTS AND PART
Page 43 and 44: Metric Tons TERC.UCDAVIS.EDU 10 8 6
Page 45 and 46: Dissolved inorganic nitrogen (micro
Page 47 and 48: Nitrate−nitrogen (micrograms per
Page 49 and 50: BIOLOGY 10
Page 51 and 52: BIOLOGY Algae abundance Yearly sinc
Page 53 and 54: BIOLOGY Depth of chlorophyll maximu
Page 55 and 56: BIOLOGY TAHOE: STATE OF THE LAKE RE
Page 57 and 58: BIOLOGY Nutrient limitation of alga
Page 59 and 60: BIOLOGY Shoreline algae distributio
Page 61 and 62: TERC.UCDAVIS.EDU CLARITY Annual ave
Page 63 and 64: Depth (feet) TERC.UCDAVIS.EDU CLARI
Page 65: TERC.UCDAVIS.EDU OUTREACH AND EDUCA

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