COMET Case Study 020: Hurricane Floyd 1999 Data at UCAR/JOSS/NOAA/CODIACEntry ID: COMET020_UCAR_JOSS_NOAA_CODIAC
Abstract: Case 020 provides focus on Hurricane Floyd which brought heavy rain
and flooding to the eastern coast of the United States and was
responsible for 68 deaths and $2.5 billion in damages.
Hurricane Floyd has been classified as one of the Significant
Weather Events of 1999 (See:
For more information, see:
(Click for Interactive Map)
Data Set Citation
Dataset Title: COMET Case Study 020: Hurricane Floyd
Dataset Release Place: Boulder, CO
Dataset Publisher: UCAR/JOSSOnline Resource: http://data.eol.ucar.edu/codiac/projs?COMET_CASE_020
This data set description is a member of a collection. The collection is described in
Start Date: 1999-09-14Stop Date: 1999-09-17
ATMOSPHERE > ATMOSPHERIC PHENOMENA > HURRICANES
ATMOSPHERE > ATMOSPHERIC PHENOMENA > STORMS
ATMOSPHERE > ATMOSPHERIC PRESSURE > ATMOSPHERIC PRESSURE MEASUREMENTS
ATMOSPHERE > ATMOSPHERIC TEMPERATURE > AIR TEMPERATURE
ATMOSPHERE > ATMOSPHERIC TEMPERATURE > SURFACE AIR TEMPERATURE
ATMOSPHERE > ATMOSPHERIC WATER VAPOR > HUMIDITY
ATMOSPHERE > ATMOSPHERIC WATER VAPOR > WATER VAPOR
ATMOSPHERE > ATMOSPHERIC WINDS > CONVECTION
ATMOSPHERE > ATMOSPHERIC WINDS > SURFACE WINDS
ATMOSPHERE > ATMOSPHERIC WINDS > UPPER LEVEL WINDS
ATMOSPHERE > PRECIPITATION > PRECIPITATION AMOUNT
ATMOSPHERE > PRECIPITATION > PRECIPITATION RATE
SPECTRAL/ENGINEERING > INFRARED WAVELENGTHS > INFRARED IMAGERY
SPECTRAL/ENGINEERING > RADAR > RADAR IMAGERY
SPECTRAL/ENGINEERING > RADAR > RADAR REFLECTIVITY
SPECTRAL/ENGINEERING > VISIBLE WAVELENGTHS > VISIBLE IMAGERY
Quality The values provided in temporal and spatial coverage are approximate only.
Taken from the 2008-2009 Progress Report:
We have developed a methodology for efficient extraction and partitioning of the UV-B screening compounds in these mosses.
Confocal microscopy was used to examine localisation of phenolics in three ... Antarctic bryophyte species and also to investigate the efficiency of the various extraction techniques in removing phenolics from C. purpureus. Confocal fluorescence images showed C. purpureus had 2-fold higher amounts of cell wall-bound than intracellular phenolics whereas Bryum pseudotriquetrum contained approximately half the amount of cell wall-bound than intracellular phenolics. In the Antarctic liverwort Cephaloziella exiliflora phenolics were predominantly intracellular with little bound to the cell walls. These results indicate that B. pseudotriquetrum and C. exiliflora rely more on intracellular UV screens than C. purpureus. In addition, confocal microscopy demonstrated that the intracellular phenolics in both B. pseudotriquetrum and C. purpureus are most likely to be localised within vacuoles.
We have also ascertained that the alkali hydrolysis extraction method is successful in extracting phenolic compounds bound to cell walls of C. purpureus although we are currently trying to modify this method to avoid the use of Sodium dodecyl sulfate since this interferes with identification of the compounds.
Using subsequent chromatography techniques, aromatic compounds, unsaturated fatty acids and an unsaturated alcohol were identified as responsible for some of the high UV activity observed in the cell wall extracts. Using HPLC we have provisionally identified a number of bisflavones and some derivatives of benzoic acids as components of the UV-absorbing compounds in C. purpureus using HPLC. We have been concentrating on the cell wall fraction in this species but these compounds appear to be in both the cell wall and intracellular compartments.
Final confirmation of the exact structure of these compounds is currently underway using LC-MS and spectroscopic methods (e.g. NMR). Once we have confirmed the identity of the compounds we can assess their relative strength as UV screens and also their precise location within the cell.
Further separation of other UV-active compounds is continuing for Bryum pseudotriquetrum.
Taken from the 2009-2010 Progress Report:
Variations to work plan or objectives:
The main field work components were not possible due to the limited time at Casey and the fact that we were not there at the start or end of the summer season.
The finding that these pigments are indeed variable depending on the UV-B radiation dose is very exciting since this means that we could potentially use these mosses as proxies for historic UV radiation around the coast of Antarctica etc.
Taken from the 2010-2011 Progress Report:
Variations to work plan or objectives:
We were not able to conduct the transplant experiment in the 2010/11 season because berths were only available in late Feb for a short time. We hope to complete this experiment in 2011/12. This means that progress on Aim 4 is limited to a small pilot and comparative experiments using Australian samples. To complete the project successfully requires berths throughout the summer season to capture the moss response adequately, unfortunately this has not been possible over the past 2 seasons, but hopefully will be possible in 2011/12.
We also did not receive grant funding for this project in 2010/11 which means that progress on the other objectives was slower than we had anticipated. Despite this the project is progressing well and we have clear evidence of the ability of Antarctic mosses to respond rapidly to environmental changes.
Access Constraints The full dataset for this project is not yet publicly available.
A copy of the species list collated during data collection is available for download from the provided URL.
Use Constraints This data set conforms to the PICCCBY Attribution License
Please follow instructions listed in the citation reference provided at http://data.aad.gov.au/aadc/metadata/citation.cfm?entry_id=ASAC_3042 when using these data.
Data Set Progress
Distribution Media: HTTP
Distribution Size: 17 kb
Distribution Format: Excel
Role: TECHNICAL CONTACT
Phone: +61 2 4221 5753
Fax: +61 2 4221 4135
Email: sharonr at uow.edu.au
Department of Biological Sciences University of Wollongong Northfields Ave
Province or State: New South Wales
Postal Code: 2522
Role: DIF AUTHOR
Phone: +61 3 6232 3244
Fax: +61 3 6232 3351
Email: dave.connell at aad.gov.au
Australian Antarctic Division 203 Channel Highway
Province or State: Tasmania
Postal Code: 7050
Waterman, M. (2008), Ultraviolet protective mechanisms in the survival of Antarctic Ceratodon purpureus and two other Antarctic bryophytes, BBiotech Honours thesis, University of Wollongong
Turnbull, J.D., Leslie, S.J., Robinson, S.A. (2009), Desiccation protects Antarctic mosses from UV-B induced DNA damage, Functional Plant Biology, 36, 214-221
Turnbull, J.D., Robinson, S.A. (2009), Accumulation of DNA damage in Antarctic mosses: correlations with ultraviolet-B radiation, temperature and turf water content vary among species., Global Change Biology, 15, 319-329
Newsham, KK., Robinson, S.A. (2009), Responses of plants in polar regions to UV-B radiation: a meta-analysis., Global Change Biology, 15, 2574-2589
Creation and Review Dates
DIF Creation Date: 2009-04-20
Last DIF Revision Date: 2011-05-04