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Sea Surface Temperature Synoptic Analysis

Sea Surface Temperature Synoptic Analysis
Author: Blair W. Gibson
Publisher:
Total Pages: 28
Release: 1962
Genre: Ocean temperature
ISBN:

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A technique is described for preparing detailed sea surface temperature analyses for large ocean areas. These analyses utilize injection tempera ture observations taken by commercial ships. The inadequacies of analyses based on averaged data and some difficulties inherent in contouring scalar fields are discussed. Sea surface temperatures are interpreted according to some concepts derived from cross-sectional profiles and surface current data. Isotach analyses of mean current drift are considered as flow pat terns to aid temperature analysis in areas where data are sparse. (Author).


Synoptic Analysis of Near Surface and Subsurface Temperatures in the Atlantic Ocean Following Hurricane Betsy

Synoptic Analysis of Near Surface and Subsurface Temperatures in the Atlantic Ocean Following Hurricane Betsy
Author: Robert C. Landis
Publisher:
Total Pages: 58
Release: 1966
Genre: Atlantic Ocean
ISBN:

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Data from sea surface temperature and bathythermograph radio messages are utilized in analyzing the thermal change in the Atlantic Ocean during the passage of Hurricane Betsy, 1965. Seven-day average sea surface temperature patterns show changes of 4 F in the wake of the hurricane, where upwelling is shown to have taken place. Two temperature sections based on observations made before and after the storm passage are composed across the hurricane path. The first temperature section, taken one week after storm passage, indicates upwelling from the depth of 200 feet. The second section, representing three weeks after storm passage, shows upwelling to have occurred but because of the time lag between storm passage and BT observation, much of this area has mixed and has been advected slightly to the north. In addition, the second section clearly shows an area of downwelling. Magnitudes of the thermal changes are shown by computations of the change in heat content for a square centimeter column of water. Results of the analyses compare favorably to previous studies based on research data and may be of use to the oceanographic forecaster. (Author).


Food Insecurity & Hydroclimate in Greater Horn of Africa

Food Insecurity & Hydroclimate in Greater Horn of Africa
Author: Joseph Awange
Publisher: Springer Nature
Total Pages: 431
Release: 2022-01-25
Genre: Science
ISBN: 3030910024

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This book will benefit users in food security, agriculture, water management, and environmental sectors. It provides the first comprehensive analysis of Greater Horn of Africa (GHA)’s food insecurity and hydroclimate using the state-of-the-art Gravity Recovery and Climate Experiment (GRACE) and its Follow-on (GRACE-FO)’s, centennial precipitation, hydrological models’ and reanalysis’ products. It is here opined that GHA is endowed with freshwater (surface and groundwater) being home to the world's second largest freshwater body (Lake Victoria) and the greatest continental water towers (Ethiopian Highlands) that if properly tapped in a sustainable way, will support its irrigated agriculture as well as pastoralism. First, however, the obsolete Nile treaties that hamper the use of Lake Victoria (White Nile) and Ethiopian Highland (Blue Nile) have to be unlocked. Moreover, GHA is bedevilled by poor governance and the ``donor-assistance” syndrome; and in 2020-2021 faced the so-called ``triple threats’’ of desert locust infestation, climate variability/change impacts and COVID-19 pandemic. Besides, climate extremes influence its meagre waters leading to perennial food insecurity. Coupled with frequent regional and local conflicts, high population growth rate, low crop yield, invasion of migratory pests, contagious human and livestock diseases (such as HIV/AIDs, COVID-19 & Rift Valley fever) and poverty, life for more than 310 million of its inhabitants simply becomes unbearable. Alarming also is the fact that drought-like humanitarian crises are increasing in GHA despite recent progress in its monitoring and prediction efforts. Notwithstanding these efforts, there remain challenges stemming from uncertainty in its prediction, and the inflexibility and limited buffering capacity of the recurrent impacted systems. To achieve greater food security, therefore, in addition to boosting GHA's agricultural output, UN Office for the Coordination of Humanitarian Affairs suggest that its “inhabitants must create more diverse and stable means of livelihood to insulate themselves and their households from external shocks”. This is a task that they acknowledge will not be easy as the path ahead is “strewn with obstacles namely; natural hazards and armed conflicts”. Understanding GHA’s food insecurity and its hydroclimate as presented in this book is a good starting point towards managing the impacts of the natural hazards on the one hand while understanding the impacts associated with extreme climate on GHA's available water and assessing the potential of its surface and groundwater to support its irrigated agriculture and pastoralism would be the first step towards “coping with drought” on the other hand. The book represents a significant effort by Prof Awange in trying to offer a comprehensive overview of the hydroclimate in the Greater Horn of Africa (GHA). Prof Eric F. Wood, NAE (USA); FRSC (Canada); Foreign member, ATSE (Australia).


Sea-surface Temperature Variability Analysis of Potential OTEC Sites Utilizing Satellite Data

Sea-surface Temperature Variability Analysis of Potential OTEC Sites Utilizing Satellite Data
Author: Fred M. Vukovich
Publisher:
Total Pages: 188
Release: 1979
Genre: Ocean temperature
ISBN:

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The primary purpose of this research was to perform an analysis of the constancy of the sea-surface temperature in candidate locations for OTEC siting. Most in situ data available to determine the constancy of the sea surface temperature were obtained using point sensors that recorded surface temperature at specific points and at specific times or for some specific period. These data, while establishing certain gross or average patterns, are inadequate for describing short-term temperature variations for large areas and are insufficient for assessing the constancy of the temperature patterns relative to selecting potential sites for OTEC. The only data available for analysis of the synoptic ocean surface temperature pattern are those obtained in the last five years by infrared scanning radiometer systems on earth observational satellites. For this study, the satellite infrared (ir) data for the period 1973-1977 were used to identify and locate major thermal fronts at the sea surface. These data were then used to glean certain statistics on these fronts. In situ data were used, when available, to determine temperature difference across specified thermal fronts. This study was performed in three regional locations of interest to OTEC. The specific regions are: Region I, Eastern Gulf of Mexico (bounded by 22 N to 30 N and 91 W to the west coast of Florida including the Straits of Florida); Region II, the east coast of Florida (bounded by 23 N to 32 N and the east coast of Florida to 79 W); and Region III, Puerto Rico and vicinity, (bounded by 17 to 19 N, 64 to 68 W). Results are presented and discussed.


Sea-surface Temperature Estimation

Sea-surface Temperature Estimation
Author: C. J. Van Vliet
Publisher:
Total Pages: 40
Release: 1967
Genre: Ocean temperature
ISBN:

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An autocorrelation analysis of six temperature records from the North Pacific and North Atlantic up to 40 years in length showed the existence of an oscillatory function with period 1 year for all the stations studied, and of another oscillatory function with period 0.5 year for most of the stations. A regression model containing annual and semiannual oscillatory terms was found to provide a good statistical fit to the observed daily temperatures. No long-term trends were detected in the sequences of annual mean temperatures, but there were significant differences among these temperatures. (Author).