Editorial Type:
Article
Article Type:
Research Article

Zonal Gradients in the Lower Atmosphere and Upper Ocean across the Windward Antilles during Midsummer 2012

Mark R. Jury Department of Physics, University of Puerto Rico, Mayaguez, Puerto Rico, and University of Zululand, KwaDlangezwa, South Africa

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Print Publication:
01 Mar 2014
DOI:
https://doi.org/10.1175/JAMC-D-13-0103.1
Page(s):
731–741
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Abstract

This observational study examines zonal gradients in the lower atmosphere and upper ocean across the windward Antilles during midsummer 2012. While earlier work reported on meridional confluence, here the focus is on the zonal enrichment of trade winds by upstream shallow seas and islands. Intercomparisons along 18.2°N are made between modern reanalysis and satellite estimates, and coastal station, moored buoy, aircraft, and radiosonde observations for one case and as a June–July 2012 average. Mean gradients per 100 km east of Puerto Rico were 0.2 g kg−1 for 925-hPa specific humidity, 0.16°C for SST, 0.01 m for sea level, and 2.0 × 10−3 g kg−1 for cloud water. Zonal changes in the lower atmosphere occur in three stages: 1) Atlantic, where westward ocean currents, strong trade winds, and subsidence prevail; 2) Antilles, where ocean currents diminish and sea temperatures increase; and 3) island, where trade winds abate [−1 m s−1 (100 km)−1] and diurnal evapotranspiration greater than 10 mm day−1 offsets large-scale subsidence producing a localized convection.

Corresponding author address: Mark Jury, Dept. of Physics, University of Puerto Rico, Rt. 108, Mayaguez, PR 00681. E-mail: mark.jury@upr.edu

Abstract

This observational study examines zonal gradients in the lower atmosphere and upper ocean across the windward Antilles during midsummer 2012. While earlier work reported on meridional confluence, here the focus is on the zonal enrichment of trade winds by upstream shallow seas and islands. Intercomparisons along 18.2°N are made between modern reanalysis and satellite estimates, and coastal station, moored buoy, aircraft, and radiosonde observations for one case and as a June–July 2012 average. Mean gradients per 100 km east of Puerto Rico were 0.2 g kg−1 for 925-hPa specific humidity, 0.16°C for SST, 0.01 m for sea level, and 2.0 × 10−3 g kg−1 for cloud water. Zonal changes in the lower atmosphere occur in three stages: 1) Atlantic, where westward ocean currents, strong trade winds, and subsidence prevail; 2) Antilles, where ocean currents diminish and sea temperatures increase; and 3) island, where trade winds abate [−1 m s−1 (100 km)−1] and diurnal evapotranspiration greater than 10 mm day−1 offsets large-scale subsidence producing a localized convection.

Corresponding author address: Mark Jury, Dept. of Physics, University of Puerto Rico, Rt. 108, Mayaguez, PR 00681. E-mail: mark.jury@upr.edu
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Journal of Applied Meteorology and Climatology

  • Allen, T. L., S. Curtis, and D. W. Gamble, 2010: The midsummer dry spell’s impact on vegetation in Jamaica. J. Appl. Meteor. Climatol., 49, 1590–1595.

    • Search Google Scholar
    • Export Citation

  • Angeles, M. E., J. E. González, N. D. Ramírez-Beltrán, C. A. Tepley, and D. E. Comarazamy, 2010: Origins of the Caribbean rainfall bimodal behavior. J. Geophys. Res., 115D, 1106–1123.

    • Search Google Scholar
    • Export Citation

  • Astling, E. G., S. M. Daggupaty, and K. R. Leslie, 1972: A diagnostic study of a non-deepening disturbance in the Caribbean Sea. J. Appl. Meteor., 11, 1305–1317.

    • Search Google Scholar
    • Export Citation

  • Behringer, D. W., 2007: The Global Ocean Data Assimilation System (GODAS) at NCEP. Preprints, 11th Symp. on Integrated Observing and Assimilation Systems for Atmosphere, Oceans, and Land Surface, San Antonio, TX, Amer. Meteor. Soc., 3.3. [Available online at https://ams.confex.com/ams/pdfpapers/119541.pdf.]

  • Bennett, S., V. Grusbisic, and R. M. Rasmussen, 1998: Gravity waves, rainbands, and deep convection induced by trade wind flow over Puerto Rico. Preprints, 12th Conf. on Numerical Weather Prediction, Phoenix, AZ, Amer. Meteor. Soc., 98–102.

  • Blanchard, D. O., and R. E. López, 1985: Spatial patterns of convection in south Florida. Mon. Wea. Rev., 113, 1282–1299.

  • Bosilovich, M. G., F. R. Robertson, and J. Chen, 2011: Global energy and water budgets in MERRA. J. Climate, 24, 5721–5739.

  • Casey, S. P. F., A. E. Dessler, and C. Schumacher, 2009: Five-year climatology of midtroposphere dry air layers in warm tropical ocean regions as viewed by AIRS/Aqua. J. Appl. Meteor. Climatol., 48, 1831–1842.

    • Search Google Scholar
    • Export Citation

  • Cooper, H., M. Garstang, and J. Simpson, 1982: The diurnal interaction between convection and peninsular-scale forcing over south Florida. Mon. Wea. Rev., 110, 486–503.

    • Search Google Scholar
    • Export Citation

  • Enfield, D. B., and S.-K. Lee, 2005: The heat balance of the Western Hemisphere warm pool. J. Climate, 18, 2662–2681.

  • Ffield, A., 2007: Amazon and Orinoco River plumes and NBC rings: Bystanders or participants in hurricane events? J. Climate, 20, 316–333.

    • Search Google Scholar
    • Export Citation

  • Gamble, D., D. Parnell, and S. Curtis, 2007: Spatial variability of the Caribbean mid-summer drought and relation to the North Atlantic high circulation. Int. J. Climatol., 28, 343–350, doi:10.1002/joc.1600.

    • Search Google Scholar
    • Export Citation

  • Hastenrath, S., 1966: On general circulation and energy budget in the area of the Central American seas. J. Atmos. Sci., 23, 694–711.

  • Huete, A., C. Justice, and H. Liu, 1994: Development of vegetation and soil indices for MODIS-EOS. Remote Sens. Environ., 49, 224–234.

    • Search Google Scholar
    • Export Citation

  • Inoue, M., I. C. Handoh, and G. R. Bigg, 2002: Bimodal distribution of tropical cyclogenesis in the Caribbean: Characteristics and environmental factors. J. Climate, 15, 2897–2905.

    • Search Google Scholar
    • Export Citation

  • Johns, E., W. D. Wilson, and R. L. Molinari, 1999: Direct observations of velocity and transport in the passages between the Intra-Americas Sea and the Atlantic Ocean 1984–1996. J. Geophys. Res., 104 (C11), 25 805–25 820.

    • Search Google Scholar
    • Export Citation

  • Joyce, R. J., J. E. Janowiak, P. A. Arkin, and P. Xie, 2004: CMORPH: A method that produces global precipitation estimates from passive microwave and infrared data at high spatial and temporal resolution. J. Hydrometeor., 5, 487–503.

    • Search Google Scholar
    • Export Citation

  • Jury, M. R., and S. Chiao, 2012: Lee-side boundary layer confluence and afternoon thunderstorms over Mayaguez, Puerto Rico. J. Appl. Meteor. Climatol., 52, 439–454.

    • Search Google Scholar
    • Export Citation

  • Jury, M. R., S. Chiao, and E. W. Harmsen, 2009: Mesoscale structure of trade wind convection over Puerto Rico, composite observations and numerical model simulation. Bound.-Layer Meteor., 132, 289–313.

    • Search Google Scholar
    • Export Citation

  • Karlsson, J., G. Svensson, S. Cardoso, J. Teixeira, and S. Paradise, 2010: Subtropical cloud-regime transitions: Boundary layer depth and cloud-top height evolution in models and observations. J. Appl. Meteor. Climatol., 49, 1845–1858.

    • Search Google Scholar
    • Export Citation

  • Kingsmill, D. E., 1995: Convection initiation associated with a sea-breeze front, a gust front, and their interaction. Mon. Wea. Rev., 123, 2913–2933.

    • Search Google Scholar
    • Export Citation

  • Lau, K.-M., H.-T. Wu, and S. Bony, 1997: The role of large-scale atmospheric circulation in the relationship between tropical convection and sea surface temperature. J. Climate, 10, 381–392.

    • Search Google Scholar
    • Export Citation

  • Lobocki, L., 2001: Calculation of surface fluxes under convective conditions by turbulence closure models. J. Appl. Meteor., 40, 604–621.

    • Search Google Scholar
    • Export Citation

  • Magaña, V., J. A. Amador, and S. Medina, 1999: The midsummer drought over Mexico and Central America. J. Climate, 12, 1577–1588.

  • Malkus, J. S., 1955: The effects of a large island upon the trade-wind air stream. Quart. J. Roy. Meteor. Soc., 81, 538–550.

  • Melas, D., A. Lavagnini, and A.-M. Sempreviva, 2000: An investigation of the boundary layer dynamics of Sardinia Island under sea-breeze conditions. J. Appl. Meteor., 39, 516–524.

    • Search Google Scholar
    • Export Citation

  • Mesinger, F., and Coauthors, 2006: North American Regional Reanalysis. Bull. Amer. Meteor. Soc., 87, 343–360.

  • Michalakes, J., J. Dudhia, D. Gill, T. Henderson, J. Klemp, W. Skamarock, and W. Wang, 2005: The Weather Research and Forecast Model: Software architecture and performance. Proceedings of the 11th ECMWF Workshop on High Performance Computing in Meteorology, W. Zwieflhofer and G. Mozdzynski, Eds., World Scientific, 156–168.

  • Murakami, M., 1983: Analysis of deep convective activity over the western Pacific and southern Asia. J. Meteor. Soc. Japan, 61, 60–75.

    • Search Google Scholar
    • Export Citation

  • Nalli, N. R., and Coauthors, 2011: Multiyear observations of the tropical Atlantic atmosphere: Multidisciplinary applications of the NOAA aerosols and ocean science expeditions. Bull. Amer. Meteor. Soc., 92, 765–789.

    • Search Google Scholar
    • Export Citation

  • Nitta, T., and S. Sekine, 1994: Diurnal variation of convective activity over the tropical western Pacific. J. Meteor. Soc. Japan, 72, 627–641.

    • Search Google Scholar
    • Export Citation

  • Niu, G.-Y., and Coauthors, 2011: The community Noah land surface model with multiparameterization options (Noah-MP): 1. Model description and evaluation with local-scale measurements. J. Geophys. Res., 116, D12109, doi:10.1029/2010JD015139.

    • Search Google Scholar
    • Export Citation

  • Ohsawa, T., H. Ueda, T. Hayashi, A. Watanabe, and J. Matsumoto, 2001: Diurnal variations of convective activity and rainfall in tropical Asia. J. Meteor. Soc. Japan, 79, 333–352.

    • Search Google Scholar
    • Export Citation

  • Oki, T., and K. Musiake, 1994: Seasonal change of the diurnal cycle of precipitation over Japan and Malaysia. J. Appl. Meteor., 33, 1445–1463.

    • Search Google Scholar
    • Export Citation

  • Pearce, R. P., R. C. Smith, and J. S. Malkus, 1956: The calculation of a sea-breeze circulation in terms of the differential heating across the coast line. Quart. J. Roy. Meteor. Soc., 82, 235–241.

    • Search Google Scholar
    • Export Citation

  • Rauscher, S. A., F. Giorgi, N. S. Diffenbaugh, and A. Seth, 2008: Extension and intensification of the Meso-American mid-summer drought in the twenty-first century. Climate Dyn., 31, 551–571, doi:10.1007/s00382-007-0359-1.

    • Search Google Scholar
    • Export Citation

  • Rienecker, M. M., and Coauthors, 2011: MERRA: NASA’s Modern-Era Retrospective Analysis for Research and Applications. J. Climate, 24, 3624–3648.

    • Search Google Scholar
    • Export Citation

  • Saha, S., and Coauthors, 2010: The NCEP Climate Forecast System Reanalysis. Bull. Amer. Meteor. Soc., 91, 1015–1057.

  • Smith, R. B., A. C. Gleason, P. A. Gluhosky, and V. Grubisic, 1997: The wake of St. Vincent. J. Atmos. Sci., 54, 606–623.

  • Snodgrass, E. R., L. Di Girolamo, and R. M. Rauber, 2009: Precipitation characteristics of trade wind clouds during RICO derived from radar, satellite, and aircraft measurements. J. Appl. Meteor. Climatol., 48, 464–483.

    • Search Google Scholar
    • Export Citation

  • Stevens, B., 2005: Atmospheric moist convection. Annu. Rev. Earth Planet. Sci., 33, 605–643.

  • Wakimoto, R. M., and N. T. Atkins, 1994: Observations of the sea-breeze front during CaPE. Part I: Single-Doppler, satellite, and cloud photogrammetry analysis. Mon. Wea. Rev., 122, 1092–1114.

    • Search Google Scholar
    • Export Citation

  • Wang, C., 2007: Variability of the Caribbean low-level jet and its relations to climate. Climate Dyn., 29, 411–422.

  • Wang, C., D. B. Enfield, S. K. Lee, and C. W. Landsea, 2006: Influences of the Atlantic warm pool on Western Hemisphere summer rainfall and Atlantic hurricanes. J. Climate, 19, 3011–3028.

    • Search Google Scholar
    • Export Citation

  • Wilson, J. W., and W. E. Schreiber, 1986: Initiation of convective storms at radar-observed boundary-layer convergence lines. Mon. Wea. Rev., 114, 2516–2536.

    • Search Google Scholar
    • Export Citation

  • Wu, P., J.-I. Hamada, S. Mori, Y. I. Tauhid, M. D. Yamanaka, and F. Kimura, 2003: Diurnal variation of precipitable water over a mountainous area of Sumatra Island. J. Appl. Meteor., 42, 1107–1115.

    • Search Google Scholar
    • Export Citation

  • Wulfmeyer, V., and T. Janjić, 2005: Twenty-four-hour observations of the marine boundary layer using shipborne NOAA high-resolution Doppler lidar. J. Appl. Meteor., 44, 1723–1744.

    • Search Google Scholar
    • Export Citation

  • Yuter, S. E., R. A. Houze Jr., E. A. Smith, T. T. Wilheit, and E. Zipser, 2005: Physical characterization of tropical oceanic convection observed in KWAJEX. J. Appl. Meteor., 44, 385–415.

    • Search Google Scholar
    • Export Citation
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