COAPS Virtual Library (Publications)

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COAPS annually produces numerous refereed publications, technical reports, and theses. Here a user can view a list of our recent (the current calendar year) publications or search for publications of interest. The search page provides a number of user selectable options. Many published abstracts, full manuscripts, and theses can be accessed in PDF format.

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	Author	Groenen, Danielle Elizabeth
	Title	Diagnosing the Atmospheric Phenomena Associated with the Onset and Demise of the Rainy Season in Mesoamerica			Type	$loc['typeJournal Article']
	Year	2019	Publication		Abbreviated Journal
	Volume		Issue		Pages
	Keywords
	Abstract	Mexico and Central America (Mesoamerica) are situated in a complex and unique geographical position with the Caribbean Sea to the East and the tropical Eastern Pacific Ocean to the West. The weather patterns of this region are driven by winds, temperatures, moisture, and orography of several mountain ranges. This study finds the dates of the onset and demise of rainfall regimes on a specific day using NASA’s Tropical Rainfall Measuring Mission (TRMM) rainfall for years 1998–2012, area-averaged over land. Using NASA’s MERRA-2 Reanalysis data, we also look at the phenomenology of the triggers of the rainy season onset and demise on the daily time-scale instead of the monthly scales used by previous studies. We find that the Mesoamerican Rainy Season can be distinguished into two parts: the Early Spring Rainfall (ESR) associated with light rains and the Late Spring Rainfall (LSR) associated with heavy rains. Two algorithms are used to obtain these rainy season distinctions. A new algorithm was developed during this study, called the SLOPE algorithm, to calculate when the rain rates first start to increase. In the second method, the daily cumulative anomalies of rainfall are compared to the climatological rainfall to find the time of onset of the heavy rains, called the MINCA algorithm. To better understand the phenomenology associated with the timing of the rainfall, we look at the monsoon trough, moisture flux convergence, moist static energy anomalies, and the weakening/strengthening of the winds associated with the Caribbean Low-Level Jet and Panama Jet. The light rain rates begin, on average, in mid-March, approximately one month after the peak of the winter Caribbean Low-Level Jet and the Panama Jet. The ramp-up between the light rains and heavy rains is associated with a significant weakening of both jets and the northward progression of a monsoon trough off the western coast of Central America. The heavy rain rates begin, on average, in mid-May, and are associated with the timing when the Panama Jet goes to near zero magnitude and a strong monsoon trough in the eastern Pacific. At the demise of the rainfall, approximately in mid-November, the Panama Jet strengthens again, the total moisture flux convergence decreases significantly, and the monsoon trough retreats southward and eastward. The results of this study have positive implications in agriculture and water resources for Mesoamerica, as this information may help resource managers better plan and adapt to climate variability.
	Address
	Corporate Author				Thesis
	Publisher		Place of Publication		Editor
	Language		Summary Language		Original Title
	Series Editor		Series Title		Abbreviated Series Title
	Series Volume		Series Issue		Edition
	ISSN		ISBN		Medium
	Area		Expedition		Conference
	Funding				Approved	$loc['no']
	Call Number	COAPS @ user @			Serial	1085
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	Author	Guerra, L.A.A.; Paiva, A.M.; Chassignet, E.P.
	Title	On the translation of Agulhas rings to the western South Atlantic Ocean			Type	$loc['typeJournal Article']
	Year	2018	Publication	Deep Sea Research Part I: Oceanographic Research Papers	Abbreviated Journal	Deep Sea Research Part I: Oceanographic Research Papers
	Volume	139	Issue		Pages	104-113
	Keywords
	Abstract	The shedding of Agulhas rings is the primary process connecting the Indian and Atlantic oceans. The rings transport warm and salty waters that feed the surface limb of the Atlantic Meridional Overturning Circulation. Early studies suggest that Agulhas rings decay and diffuse their contents within the South Atlantic subtropical gyre. In this paper, we update the ring census using an automated algorithm to detect and track eddies over more than 23 years of satellite altimetry data (1993-2016) and calculate their main characteristics. While 140 rings spawned from the Agulhas Retroflection, their following splitting and merging resulted in 74 long-lived rings that crossed the Walvis Ridge and translated towards the west. Eventually, three rings reached the western boundary. For one of them, we use in situ measurements to document its interaction with the Brazil Current and two cyclonic eddies, which resulted in a current velocity increase by three times. Although already hypothesized, this interaction had not been demonstrated with in situ evidence until now.
	Address
	Corporate Author				Thesis
	Publisher		Place of Publication		Editor
	Language		Summary Language		Original Title
	Series Editor		Series Title		Abbreviated Series Title
	Series Volume		Series Issue		Edition
	ISSN	0967-0637	ISBN		Medium
	Area		Expedition		Conference
	Funding				Approved	$loc['no']
	Call Number	COAPS @ user @			Serial	994
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	Author	Guimond, S. R.; Turk, J.; Blankenship, C.; Hawkins, J.
	Title	Detecting tropical cyclone structural change with the TRMM Precipitation Radar (PR) and Advanced Microwave Sounding Unit (AMSU)			Type	$loc['typeConference Article']
	Year	2006	Publication	86th Annual American Meteorological Society Meeting, Office of Naval Research, Atlanta, Georgia, USA	Abbreviated Journal
	Volume		Issue		Pages
	Keywords
	Abstract
	Address
	Corporate Author				Thesis
	Publisher		Place of Publication		Editor
	Language		Summary Language		Original Title
	Series Editor		Series Title		Abbreviated Series Title
	Series Volume		Series Issue		Edition
	ISSN		ISBN		Medium
	Area		Expedition		Conference
	Funding				Approved	$loc['no']
	Call Number	COAPS @ mfield @			Serial	920
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	Author	Henson, J. I.; Muller-Karger, F.; Wilson, D.; Morey, S. L.; Maul, G. A.; Luther, M.; Kranenburg, C.
	Title	Strategic geographic positioning of sea level gauges to aid in early detection of tsunamis in the Intra-Americas Sea			Type	$loc['typeJournal Article']
	Year	2006	Publication	Science of Tsunami Hazards	Abbreviated Journal
	Volume	25	Issue	3	Pages	173-207
	Keywords
	Abstract
	Address
	Corporate Author				Thesis
	Publisher		Place of Publication		Editor
	Language		Summary Language		Original Title
	Series Editor		Series Title		Abbreviated Series Title
	Series Volume		Series Issue		Edition
	ISSN		ISBN		Medium
	Area		Expedition		Conference
	Funding				Approved	$loc['no']
	Call Number	COAPS @ mfield @			Serial	940
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	Author	Hilburn, K. A.; Bourassa, M. A.; O'Brien, J. J.
	Title	Development of scatterometer-derived research-quality surface pressure fields for the Southern Ocean			Type	$loc['typeReport']
	Year	2002	Publication		Abbreviated Journal
	Volume		Issue		Pages	30-31
	Keywords
	Abstract
	Address
	Corporate Author				Thesis
	Publisher	AMS	Place of Publication	Orlando, FL	Editor
	Language		Summary Language		Original Title
	Series Editor		Series Title		Abbreviated Series Title
	Series Volume		Series Issue		Edition
	ISSN		ISBN		Medium
	Area		Expedition		Conference
	Funding	NASA, ONR			Approved	$loc['no']
	Call Number	COAPS @ mfield @			Serial	838
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	Author	Hite, M.; Bourassa, M. A.; O'Brien, J. J.
	Title	Objective detection of Atlantic tropical disturbances			Type	$loc['typeConference Article']
	Year	2006	Publication	14th Conference on Interactions of the Sea and Atmosphere, AMS, Monterey, CA, USA	Abbreviated Journal
	Volume		Issue		Pages	cdrom
	Keywords
	Abstract
	Address
	Corporate Author				Thesis
	Publisher		Place of Publication		Editor
	Language		Summary Language		Original Title
	Series Editor		Series Title		Abbreviated Series Title
	Series Volume		Series Issue		Edition
	ISSN		ISBN		Medium
	Area		Expedition		Conference
	Funding	NASA, OVWST, OSU, TCSP			Approved	$loc['no']
	Call Number	COAPS @ mfield @			Serial	932
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	Author	Hite, M. M.; Bourassa, M. A.; O'Brien, J. J.
	Title	Vorticity-Based Detection Of Tropical Cyclones			Type	$loc['typeConference Article']
	Year	2006	Publication	14th Conference on Interactions of the Sea and Atmosphere, American Meteorological Society, Atlanta, Ga, USA	Abbreviated Journal
	Volume		Issue		Pages	cdrom
	Keywords
	Abstract
	Address
	Corporate Author				Thesis
	Publisher		Place of Publication		Editor
	Language		Summary Language		Original Title
	Series Editor		Series Title		Abbreviated Series Title
	Series Volume		Series Issue		Edition
	ISSN		ISBN		Medium
	Area		Expedition		Conference
	Funding	NASA, OSU, SEAWINDS			Approved	$loc['no']
	Call Number	COAPS @ mfield @			Serial	922
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	Author	Hoffman, R.N.; Privé, N.; Bourassa, M.
	Title	Comments on “Reanalyses and Observations: What's the Difference?”			Type	$loc['typeJournal Article']
	Year	2017	Publication	Bulletin of the American Meteorological Society	Abbreviated Journal	Bull. Amer. Meteor. Soc.
	Volume	98	Issue	11	Pages	2455-2459
	Keywords	GEOPHYSICAL DATA; marine surface winds; energy and water cycles
	Abstract	Are there important differences between reanalysis data and familiar observations and measurements? If so, what are they? This essay evaluates four possible answers that relate to: the role of inference, reliance on forecasts, the need to solve an ill-posed inverse problem, and understanding of errors and uncertainties. The last of these is argued to be most significant. The importance of characterizing uncertainties associated with results—whether those results are observations or measurements, analyses or reanalyses, or forecasts—is emphasized.
	Address
	Corporate Author				Thesis
	Publisher		Place of Publication		Editor
	Language		Summary Language		Original Title
	Series Editor		Series Title		Abbreviated Series Title
	Series Volume		Series Issue		Edition
	ISSN	0003-0007	ISBN		Medium
	Area		Expedition		Conference
	Funding				Approved	$loc['no']
	Call Number	COAPS @ rl18 @			Serial	990
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	Author	Holbach, H.M.; Uhlhorn, E.W.; Bourassa, M.A.
	Title	Off-Nadir SFMR Brightness Temperature Measurements in High-Wind Conditions			Type	$loc['typeJournal Article']
	Year	2018	Publication	Journal of Atmospheric and Oceanic Technology	Abbreviated Journal	J. Atmos. Oceanic Technol.
	Volume	35	Issue	9	Pages	1865-1879
	Keywords	Tropical cyclones; Wind; Air-sea interaction; Microwave observations; Remote sensing; Surface observations
	Abstract	Wind and wave-breaking directions are investigated as potential sources of an asymmetry identified in off-nadir remotely sensed measurements of ocean surface brightness temperatures obtained by the Stepped Frequency Microwave Radiometer (SFMR) in high-wind conditions, including in tropical cyclones. Surface wind speed, which dynamically couples the atmosphere and ocean, can be inferred from SFMR ocean surface brightness temperature measurements using a radiative transfer model and an inversion algorithm. The accuracy of the ocean surface brightness temperature to wind speed calibration relies on accurate knowledge of the surface variables that are influencing the ocean surface brightness temperature. Previous studies have identified wind direction signals in horizontally polarized radiometer measurements in low to moderate (0�20 m s−1) wind conditions over a wide range of incidence angles. This study finds that the azimuthal asymmetry in the off-nadir SFMR brightness temperature measurements is also likely a function of wind direction and extends the results of these previous studies to high-wind conditions. The off-nadir measurements from the SFMR provide critical data for improving the understanding of the relationships between brightness temperature, surface wave�breaking direction, and surface wind vectors at various incidence angles, which is extremely useful for the development of geophysical model functions for instruments like the Hurricane Imaging Radiometer (HIRAD).
	Address
	Corporate Author				Thesis
	Publisher		Place of Publication		Editor
	Language		Summary Language		Original Title
	Series Editor		Series Title		Abbreviated Series Title
	Series Volume		Series Issue		Edition
	ISSN	0739-0572	ISBN		Medium
	Area		Expedition		Conference
	Funding				Approved	$loc['no']
	Call Number	COAPS @ rl18 @			Serial	980
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	Author	Hu, X.; Cai, M.; Yang, S.; Wu, Z.
	Title	Delineation of thermodynamic and dynamic responses to sea surface temperature forcing associated with El Niño			Type	$loc['typeJournal Article']
	Year	2018	Publication	Climate Dynamics	Abbreviated Journal	Clim Dyn
	Volume	51	Issue	11-12	Pages	4329-4344
	Keywords	El Niño; SST anomalies; Thermodynamic and dynamic responses; Gill-type response
	Abstract	A new framework is proposed to gain a better understanding of the response of the atmosphere over the tropical Pacific to the radiative heating anomaly associated with the sea surface temperature (SST) anomaly in canonical El Niño winters. The new framework is based on the equilibrium balance between thermal radiative cooling anomalies associated with air temperature response to SST anomalies and other thermodynamic and dynamic processes. The air temperature anomalies in the lower troposphere are mainly in response to radiative heating anomalies associated with SST, atmospheric water vapor, and cloud anomalies that all exhibit similar spatial patterns. As a result, air temperature induced thermal radiative cooling anomalies would balance out most of the radiative heating anomalies in the lower troposphere. The remaining part of the radiative heating anomalies is then taken away by an enhancement (a reduction) of upward energy transport in the central-eastern (western) Pacific basin, a secondary contribution to the air temperature anomalies in the lower troposphere. Above the middle troposphere, radiative effect due to water vapor feedback is weak. Thermal radiative cooling anomalies are mainly in balance with the sum of latent heating anomalies, vertical and horizontal energy transport anomalies associated with atmospheric dynamic response and the radiative heating anomalies due to changes in cloud. The pattern of Gill-type response is attributed mainly to the non-radiative heating anomalies associated with convective and large-scale energy transport. The radiative heating anomalies associated with the anomalies of high clouds also contribute positively to the Gill-type response. This sheds some light on why the Gill-type atmospheric response can be easily identifiable in the upper atmosphere.
	Address
	Corporate Author				Thesis
	Publisher		Place of Publication		Editor
	Language		Summary Language		Original Title
	Series Editor		Series Title		Abbreviated Series Title
	Series Volume		Series Issue		Edition
	ISSN	0930-7575	ISBN		Medium
	Area		Expedition		Conference
	Funding				Approved	$loc['no']
	Call Number	COAPS @ user @			Serial	997
Permanent link to this record