A Land of Flowers on a Latitude of Deserts: aiding conservation and - - PowerPoint PPT Presentation

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A Land of Flowers on a Latitude of Deserts: aiding conservation and - - PowerPoint PPT Presentation

Oct 29, 2022 310 likes •643 views

A Land of Flowers on a Latitude of Deserts: aiding conservation and management of Floridas biodiversity reanalysis Vasu Misra Dept. of Earth, Ocean, and Atmospheric Science & Center for Ocean Atmospheric Prediction Studies # C oupled L

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A Land of Flowers on a Latitude of Deserts: aiding conservation and management of Florida’s biodiversity reanalysis

Vasu Misra

  • Dept. of Earth, Ocean, and Atmospheric Science

& Center for Ocean‐Atmospheric Prediction Studies

# Coupled Land Atmosphere Regional Reanalysis for the Southeast US at 10km

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Project Partners

  • T. J. Smith (Southeast Ecological Science Center, USGS)

Don DeAngelis (SESC, USGS) Ann Foster (SESC, USGS) Cathy Langtimm (SESC, USGS) Dan Slone (SESC, USGS) Eric Swain (WRD, USGS) Dave Sumner (WRD, USGS) Nathaniel Plant (GD, USGS) Susan Walls (SESC, USGS)

  • V. Misra (COAPS, FSU)
  • E. Chassignet (COAPS, FSU)

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Acknowledgements

  • Dr. Lydia Stefanova
  • Dr. Steven Chan
  • Mr. Steven DiNapoli
  • Ms. Lauren Moeller

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Project Goals

I) Provide assessments over peninsular Florida of:

  • Changes in precipitation and temperature
  • Changes in seasonality
  • Changes in frequency of derivative products like chill

days, extreme heat days, frost days, wild fire threat

  • Changes in mean regional circulation, evapo‐

transpiration II) Assess the uncertainties/sensitivity in the above from greenhouse gas concentration changes and LULC III) Develop scenarios for selected species/habitats/ecosystems based on above

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“The models that have lower values of relative entropy, hence have higher fidelity in simulating the present climate, produce higher values of global warming for a doubling of CO2. This suggest that the projected global warming due to increasing CO2 is likely to be closer to the highest projected estimates among the current generation of climate models”.

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“In our analysis there is no evidence of future prediction skill delivered by past performance‐based model selection. We speculate that the cause of this behavior is the non‐stationarity

  • f

the climate feedback strengths. Models that respond accurately in one period are likely to have the correct feedback strength at that time. However the feedback strength and forcing is not stationary, favoring no particular model or groups of models consistently.”

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R2 ERA40 CLARReS10‐ ERA CLARReS1 0‐R2 PRISM CPC Annual mean climatological precipitation (mm/day)

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R2 ERA40 CLARReS10‐ ERA CLARReS10‐ R2 PRISM CPC June‐July‐August mean climatological precipitation (mm/day)

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CLARReS‐R2 CLARReS‐ERA40 Observations

  • Diff. betn top two panels

Timing of diurnal zenith of precipitation

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Conclusions I

  • CLARReS10 is cheap, effective way of producing

consistent atmospheric analysis for the Southeast US that could be used for retrospective analysis.

  • CLARReS10 is comparable or even better than

CFSR and MERRA

  • With bias correction, CLARReS10 has been

successfully applied for hydrological applications in South Florida.

  • Some issues with cloud forcing were found in

SFWMD

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Low Frequency variations of sea breeze using CLARReS10

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Thermal circulation

arises due to differential heating (Biggs and Graves 1962)

Strongest during the

summer Sea Breeze

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Observed JJA SST (ERSSTV3) and 850hPa winds (R2) for 5 large (1981, 1987, 1995, 1998, 1999) and small (1984, 1986, 1989, 1993, 1994) AWP years

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Observed JJA rainfall from CPC rain gauge based rainfall (Higgins et al. 2000) for the 5 large and the small AWP years.

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AWP Composite Difference

Seasonal 4pm

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Precip in mm/day

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Length of the Wet Season (LOWS)

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1

( ) ( ( ) )

day n

A day R n R

=

= −

∑

A(day) = Anomalous accumulation R(n) = daily rainfall R = annual average daily precipitation The rainy season is considered to be when the slope of the curve is positive. Defining length of the season

Courtesy: Brant Liebmann/NOAA‐CIRES

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Average date of initiation: 30 December

East Central Amazon Courtesy: Brant Liebmann/NOAA‐CIRES

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Miami, 25046’N Montgomery, Alabama [32022’N] 27

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Climatology Climatology Standard deviation Standard deviation

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Climatology of LOWS Standard deviation of LOWS

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Significant correlation between LOWS and Bermuda High Index (BHI) at 90% confidence

  • interval. BHI= JJA MSLP difference between Bermuda (350N, 650W) and New Orleans

(300N, 900W).

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Conclusions‐‐II

  • CLARReS10 offers opportunity to examine low

frequency features of local scale phenomenon

  • The seabreeze along Panhandle FL and

possibly further westward is modulated by the Bermuda high.

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Future work

  • Analyze the model runs with increased

concentrations of CO2

  • Analyze the model runs with change in land

cover

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