SO442 Tropical Meteorology Name Lab 2 Due Tue 17 October
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| SO442 – Tropical Meteorology Name ________________________
Lab 2 – Due Tue 17 October Objectives. The objectives of this lab activity are: Learn more about the interaction between a tropical cyclone and its environment Examine the variability of tropical cyclone track and intensity (Re-)Familiarize yourself with the netCDF data format Learn how to plot overlay maps Overview. Tropical cyclones (TCs) interact, often strongly, with their environment. Both the track and the intensity of the TC are heavily influenced by the surrounding conditions. In Lab 1, you examined base-state conditions of the tropics and compared them at different points in the year. In this lab, you will look at some of those same variables, but at key points during the life cycle of a TC of your choosing. Data sources: 1. TC track and intensity are available from Unisys. Choose the basin, the year, and the storm, and select “Tracking information” for lat, lon, time, and intensity. 2. Reanalyis. The ERA-Interim reanalysis that you are already familiar with (http://apps.ecmwf.int/datasets/data/interim-full-daily/levtype=sfc/) is an excellent source. However, it is NOT updated in real time, meaning if you wish to study a 2017 Atlantic Hurricane from after July 2017, you will have to use a different reanalysis product. The NCEP/NCAR Reanalysis I product IS also updated in real time (with a 1-2 day delay; https://www.esrl.noaa.gov/psd/data/gridded/data.ncep.reanalysis.html), and it is a very high-quality product, too. For whichever data source you use, be sure to download it at 2.5° x 2.5° lat-lon resolution. Use guidance from Lab 1 if you have questions on how to download the data. If you choose a TC from after 31 July 2017, you will need to download a 64-km SST product from NASA (https://podaac.jpl.nasa.gov/Multi-scale_Ultra-high_Resolution_MUR-SST) Instructor Davies has offered assistance in downloading and plotting (not only of SST, but for any aspect of the lab). There is a detailed tutorial on MATLAB and netCDF data plotting in Lab 3 in SO254 (https://www.usna.edu/Users/oceano/barrett/SO254.htm). Tasks: There are several key components to the analysis of this lab. The main goal is to link the evolution of your TC to the environment nearby. Most scholarship suggests that the near-storm environment doesn’t extend much beyond the central dense overcast (cirrus cloud) region (so within 500 km of the center). The first task of the lab is to select a TC for analysis. Once you have selected a TC for analysis, you should: Plot a track map with the track colorized by intensity. Black=depression, Blue=tropical storm, red=hurricane, purple=major hurricane. Overlay coastlines and scale to the entire North Atlantic Ocean (-100 to 0 E and 5 to 65 N). Plot a time-intensity time series (time is the x-axis, intensity is the y-axis) for the life cycle of the storm. Color the lines the same way as in #1. At 1200 UTC for each day of your storm’s life, plot the following: 200 mb height (faint gray curves, in meters, following the standards: 12000 m +/- every 60 m). Overlay the wind field (quivered vectors). Precipitable water content, in kg m-2, contour-filled. Standardize the range from 0 to 60. MSLP (faint gray curves, in hPa, following the standards: 1000 hPa +/- every 4 hPa). Overlay the 10-m wind field (quivered vectors). Twice (at the start of the TC life, and again at the end): Contour fill the Sea Surface Temperatures, in °C ranging from 15-30 °C. Use the “jet” colormap and contour every 1°C. In each of the plots above, plot the entire TC track in a thick dark line. Annotate in PPT using a large dark circle the current position of the storm. Add, in a text box in the upper-left corner, the intensity of the TC (in both wind speed and minimum pressure) and the date and time using standard convention, eg 1200 UTC 25 AUG 2017). Pretty up each of the figures. Maximize the figure window before saving. For figures with color, include a color bar. Group presentations are currently set for class Tuesday 17 October. Each group has approx. 10 minutes to present the results for their TC. Each group member should present equally. Directory: Users -> oceano -> barrett Users -> Semester practice test Multiple Choice Users -> Guide to Geography. Jan 4 2006 Users -> U. S. National Hurricane Center: most tropical storms: There were 26 tropical storms in 2005 (so far) Users -> M. L. Stapleton, Spenser’s Ovidian Poetics Users -> Jessy Van Horn Experimental and Methods Users -> Updated: 6 October 2009 Users -> Early Middle Ages Users -> Using gis to Assess the Symmetry of Tropical Cyclone Rain Shields Users -> Last Name: Skourlas First Name: Christos Marital Status: Married Work Address barrett -> SO335 Lab 2 – Sea Surface Currents in the North Atlantic Ocean Download 7.98 Kb. Share with your friends:
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