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1.

Вид документа : Статья из журнала
Шифр издания :
Автор(ы) : Shevyrnogov A., Vysotskaya G., Shevyrnogov E.
Заглавие : Trends of chlorophyll concentration in the surface layer of the Northern and Central Atlantic, a satellite data-based study
Место публикации : Advances in Space Research. - 2002. - Vol. 30, Is. 11. - С. 2535-2540. - ISSN 02731177 (ISSN) , DOI 10.1016/S0273-1177(02)80332-5
Ключевые слова (''Своб.индексиров.''): chlorophyll--climatology--data reduction--ocean engineering--satellites--surface properties--chlorophyll concentration--space research--chlorophyll--pigment--remote sensing--seasonality--surface water--atlantic ocean
Аннотация: The new data on anomalies in seasonal dynamics of chlorophyll concentration in the ocean have altered the approach to the analysis of long-term trends of phytopigments in the surface layer of the ocean. Zones have been found in which at various times there was a many-fold increase in chlorophyll concentration versus its usual level. These changes are local in time and space. If anomalies in the long-term tendencies in the change of phytopigment surface distribution in the ocean are ignored in the analysis, the resulting picture will inadequately reflect the real processes. The work presents the results of the analysis of long-term trends of chlorophyll concentration on the basis of the CZCS satellite data in the Atlantic Ocean. The results are given as maps representing different variants of trends. The data obtained can be used to analyze the consequences of long-term changes of climate and changes in the interaction between the atmosphere and the ocean. В©2002 COSPAR. Published by Elsevier Science Ltd. All rights reserved.
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2.

Вид документа : Статья из сборника (однотомник)
Шифр издания :
Автор(ы) : Shevyrnogov A..., Vysotskaya G..., Shevyrnogov E...
Заглавие : Trends of chlorophyll concentration in the surface layer of the northern and central Atlantic, a satellite data-based study
Колич.характеристики :6 с
Место публикации : EARTH'S ATMOSPHERE, OCEAN AND SURFACE STUDIES. Ser. ADVANCES IN SPACE RESEARCH: PERGAMON-ELSEVIER SCIENCE LTD, 2002. - Vol. 30: A0 1, A0 4-A0 5, A3 1, C1 1 and C2 6 Symposia of the COSPAR Scientific Commissions A and C held at the 33rd COSPAR Scientific Assembly (JUL , 2000, WARSAW, POLAND), Is. 11. - P2535-2540. - ISBN 0273-1177, DOI 10.1016/S0273-1177(02)80332-5
Примечания : Cited References: 7
Аннотация: The new data on anomalies in seasonal dynamics of chlorophyll concentration in the ocean have altered the approach to the analysis of long-term trends of phytopigments in the surface layer of the ocean. Zones have been found in which at various times there was a many-fold increase in chlorophyll concentration versus its usual level. These changes are local in time and space. If anomalies in the. long-term tendencies in the change of phytopigment surface distribution in the ocean are ignored in the analysis, the resulting picture will inadequately reflect the real processes. The work presents the results of the analysis of long-term trends of chlorophyll concentration on the basis of the CZCS satellite data in the Atlantic Ocean. The results are given as maps representing different variants of trends. The data obtained can be used to analyze the consequences of long-term changes of climate and changes in the interaction between the atmosphere and the ocean. (C) 2002 COSPAR. Published by Elsevier Science Ltd. All rights reserved.
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3.

Вид документа : Статья из сборника (однотомник)
Шифр издания :
Автор(ы) : Shevyrnogov A..., Vysotskaya G..., Shevyrnogov E...
Заглавие : Spatial and temporal anomalies of sea surface temperature in global scale (by space-based data)
Колич.характеристики :5 с
Место публикации : CLIMATE CHANGE PROCESSES IN THE STRATOSPHERE, EARTH-ATMOSPHERE-OCEAN SYSTEMS, AND OCEANOGRAPHIC PROCESSES FROM SATELLITE DATA. Ser. ADVANCES IN SPACE RESEARCH: PERGAMON-ELSEVIER SCIENCE LTD, 2004. - Vol. 33: 2nd World Space Congress/34th COSPAR Scientific Assembly (OCT 10-19, 2002, HOUSTON, TX), Is. 7. - P1179-1183. - ISBN 0273-1177, DOI 10.1016/S0273-1177(03)00369-7
Примечания : Cited References: 6
Ключевые слова (''Своб.индексиров.''): temperature--anomalies--hydrological structure--chlorophyll--space-based data
Аннотация: The work presents the data on the spatial distribution of temperature anomalies in the Global Ocean, based on the long-term measurements with the AVHRR satellite equipment. It is noteworthy that such results can be only obtained by using long time series of satellite images. To obtain them by ship-borne methods is actually impossible. The proposed anomaly criterion is equal to a difference between minimum/maximum and average temperature, normed for the mean square deviation. The difference is calculated from the whole time series (with regard to a season). Based on this criterion, anomalies can be distinguished on the background of usual seasonal dynamics at various absolute values of deviations of the measured parameter. Besides, rare, single, fluctuations can be also revealed. Based on the proposed criterion, connected zones have been defined. These zones occur almost in every part of the Global Ocean. The data obtained have been analyzed in association with the CZCS (1978-1986) and SeaWiFS satellite images in order to compare them with the areas of anomalous dynamics of chlorophyll concentration and the regions quasistationary in the seasonal dynamics of chlorophyll. Anomalies in the temperature dynamics are of exceptional importance for the formation of climatic deviations; they affect the ocean-atmosphere interaction and reflect variations in the hydrological structure of the surface waters. The work presents a comparison with the dynamics of chlorophyll concentration distribution determined from the SeaWiFS data for the Atlantic Ocean. (C) 2003 COSPAR. Published by Elsevier Ltd. All rights reserved.
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4.

Вид документа : Статья из журнала
Шифр издания :
Автор(ы) : Shevyrnogov A., Vysotskaya G., Shevyrnogov E.
Заглавие : Spatial and temporal anomalies of sea surface temperature in global scale (by space-based data)
Место публикации : Advances in Space Research. - 2004. - Vol. 33, Is. 7. - С. 1179-1183. - ISSN 02731177 (ISSN) , DOI 10.1016/S0273-1177(03)00369-7
Ключевые слова (''Своб.индексиров.''): anomalies--chlorophyll--hydrological structure--space-based data--temperature--chlorophyll--data reduction--oceanography--satellites--surface properties--temperature measurement--satellite images--spatial distribution--space research--avhrr--chlorophyll--remote sensing--satellite imagery--sea surface temperature
Аннотация: The work presents the data on the spatial distribution of temperature anomalies in the Global Ocean, based on the long-term measurements with the AVHRR satellite equipment. It is noteworthy that such results can be only obtained by using long time series of satellite images. To obtain them by ship-borne methods is actually impossible. The proposed anomaly criterion is equal to a difference between minimum/maximum and average temperature, normed for the mean square deviation. The difference is calculated from the whole time series (with regard to a season). Based on this criterion, anomalies can be distinguished on the background of usual seasonal dynamics at various absolute values of deviations of the measured parameter. Besides, rare, single, fluctuations can be also revealed. Based on the proposed criterion, connected zones have been defined. These zones occur almost in every part of the Global Ocean. The data obtained have been analyzed in association with the CZCS (1978-1986) and SeaWiFS satellite images in order to compare them with the areas of anomalous dynamics of chlorophyll concentration and the regions quasistationary in the seasonal dynamics of chlorophyll. Anomalies in the temperature dynamics are of exceptional importance for the formation of climatic deviations; they affect the ocean-atmosphere interaction and reflect variations in the hydrological structure of the surface waters. The work presents a comparison with the dynamics of chlorophyll concentration distribution determined from the SeaWiFS data for the Atlantic Ocean. В© 2003 COSPAR. Published by Elsevier Ltd. All rights reserved.
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5.

Вид документа : Статья из сборника (однотомник)
Шифр издания :
Автор(ы) : Shevyrnogov A..., Vysotskaya G..., Shevyrnogov E...
Заглавие : Spatial and temporal anomalies of chlorophyll concentration in Atlantic ocean (by space-based data)
Колич.характеристики :6 с
Место публикации : EARTH'S ATMOSPHERE, OCEAN AND SURFACE STUDIES. Ser. ADVANCES IN SPACE RESEARCH: PERGAMON-ELSEVIER SCIENCE LTD, 2002. - Vol. 30: A0 1, A0 4-A0 5, A3 1, C1 1 and C2 6 Symposia of the COSPAR Scientific Commissions A and C held at the 33rd COSPAR Scientific Assembly (JUL , 2000, WARSAW, POLAND), Is. 11. - P2541-2546. - ISBN 0273-1177, DOI 10.1016/S0273-1177(02)80334-9
Примечания : Cited References: 5
Аннотация: The work-presents long-standing CZCS-satellite-based data about spatial distribution of anomalies in chlorophyll concentration and temperature of the ocean. An anomaly criterion is proposed. Maps of Atlantic ocean areas with elevated probability of anomalies are given. Properties of anomalous zones in different parts of the Atlantic ocean are discussed. Satellite-based maps of anomaly coefficients for chlorophyll concentration and temperature in the Atlantic ocean have been shown to feature substantial differences, the zones of elevated anomaly of chlorophyll concentration and temperature - to be close only in the vicinity of the Amazon outflow into the Atlantic ocean. Along with fundamental knowledge about dynamics of biological phenomena in the ocean the methods described may be used to reveal deviations due to anthropogenic impact. The methods presented may be used to process SeaWiFS program data. The data derived may be used to analyze long-standing time series to estimate randomness of current changes. (C) 2002 COSPAR. Published by Elsevier Science Ltd. All rights reserved.
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6.

Вид документа : Статья из журнала
Шифр издания :
Автор(ы) : Shevyrgonov A., Vysotskaya G., Shevyrgonov E.
Заглавие : Spatial and temporal anomalies of chlorophyll concentration in Atlantic ocean (by space-based data)
Место публикации : Advances in Space Research. - 2002. - Vol. 30, Is. 11. - С. 2541-2546. - ISSN 02731177 (ISSN) , DOI 10.1016/S0273-1177(02)80334-9
Ключевые слова (''Своб.индексиров.''): chlorophyll--data reduction--ocean engineering--probability--thermal effects--time series analysis--chlorophyll concentration--space research--chlorophyll--remote sensing--sea surface--spatiotemporal analysis--atlantic ocean
Аннотация: The work presents long-standing CZCS-satellite-based data about spatial distribution of anomalies in chlorophyll concentration and temperature of the ocean. An anomaly criterion is proposed. Maps of Atlantic ocean areas with elevated probability of anomalies are given. Properties of anomalous zones in different parts of the Atlantic ocean are discussed. Satellite-based maps of anomaly coefficients for chlorophyll concentration and temperature in the Atlantic ocean have been shown to feature substantial differences, the zones of elevated anomaly of chlorophyll concentration and temperature - to be close only in the vicinity of the Amazon outflow into the Atlantic ocean. Along with fundamental knowledge about dynamics of biological phenomena in the ocean the methods described may be used to reveal deviations due to anthropogenic impact. The methods presented may be used to process SeaWiFS prograna data. The data derived may be used to analyze long-standing time series to estimate randomness of cunent changes. В©2002 COSPAR. Published by Elsevier Science Ltd. All rights reserved.
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7.

Вид документа : Статья из журнала
Шифр издания :
Автор(ы) : Shevyrnogov A., Vysotskaya G., Shevyrnogov E.
Заглавие : Results of analysis of spatial and temporal long-term stability of quasistationary areas in the Atlantic Ocean based on multi-satellite measurements (CZCS and SeaWiFS data)
Место публикации : Advances in Space Research. - 2004. - Vol. 33, Is. 7. - С. 1184-1188. - ISSN 02731177 (ISSN) , DOI 10.1016/S0273-1177(03)00366-1
Ключевые слова (''Своб.индексиров.''): chlorophyll--hydrological structure--seasonal dynamics--space-based data--chlorophyll--data reduction--hydrology--oceanography--satellites--quasistationary--spatial distribution--space research--chlorophyll--czcs--oceanic circulation--remote sensing--seawifs--spatiotemporal analysis--atlantic ocean
Аннотация: The paper analyzes the stability of areas in the Global Ocean, which are quasistationary with respect to the seasonal dynamics of chlorophyll concentration. Such areas were first discovered based on the CZCS data. They occur almost in all regions of the Global Ocean. They reflect typical seasonal dynamics of phytoplankton, which depends on both large ocean currents and local hydrological instability. It is related to the displacement of frontal zones and to local hydrological anomalies. Since the completion of the CZCS work there has been a 10 years gap in monitoring chlorophyll spatial distribution dynamics in the ocean. The reason is the long absence of equipment on the orbit, which would be suitable for the measurement of chlorophyll concentration. Recently, SeaWiFS data have been accumulated and their quantity is sufficient for the crude statistical analysis of image time series for 25 years. Thus, it has become possible to obtain data on the long-term stability of quasistationary areas and, therefore, on the stability of large-scale hydrological phenomena in the Atlantic Ocean. В© 2003 COSPAR. Published by Elsevier Ltd. All rights reserved.
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8.

Вид документа : Статья из сборника (однотомник)
Шифр издания :
Автор(ы) : Shevyrnogov A..., Vysotskaya G..., Shevyrnogov E...
Заглавие : Results of analysis of spatial and temporal long-term stability of quasistationary areas in the Atlantic Ocean based on multi-satellite measurements (CZCS and SeaWiFS data)
Колич.характеристики :5 с
Место публикации : CLIMATE CHANGE PROCESSES IN THE STRATOSPHERE, EARTH-ATMOSPHERE-OCEAN SYSTEMS, AND OCEANOGRAPHIC PROCESSES FROM SATELLITE DATA. Ser. ADVANCES IN SPACE RESEARCH: PERGAMON-ELSEVIER SCIENCE LTD, 2004. - Vol. 33: 2nd World Space Congress/34th COSPAR Scientific Assembly (OCT 10-19, 2002, HOUSTON, TX), Is. 7. - P1184-1188. - ISBN 0273-1177, DOI 10.1016/S0273-1177(03)00366-1
Примечания : Cited References: 6
Ключевые слова (''Своб.индексиров.''): chlorophyll--seasonal dynamics--hydrological structure--space-based data
Аннотация: The paper analyzes the stability of areas in the Global Ocean, which are quasistationary with respect to the seasonal dynamics of chlorophyll concentration. Such areas were first discovered based on the CZCS data. They occur almost in all regions of the Global Ocean. They reflect typical seasonal dynamics of phytoplankton, which depends on both large ocean currents and local hydrological instability. It is related to the displacement of frontal zones and to local hydrological anomalies. Since the completion of the CZCS work there has been a 10 years gap in monitoring chlorophyll spatial distribution dynamics in the ocean. The reason is the long absence of equipment on the orbit, which would be suitable for the measurement of chlorophyll concentration. Recently, SeaWiFS data have been accumulated and their quantity is sufficient for the crude statistical analysis of image time series for 25 years. Thus, it has become possible to obtain data on the long-term stability of quasistationary areas and, therefore, on the stability of large-scale hydrological phenomena in the Atlantic Ocean. (C) 2003 COSPAR. Published by Elsevier Ltd. All rights reserved.
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9.

Вид документа : Статья из журнала
Шифр издания :
Автор(ы) : Shevyrnogov A.P., Vysotskaya G.S., Gitelson J.I.
Заглавие : Quasistationary areas of chlorophyll concentration in the world ocean as observed satellite data
Место публикации : Advances in Space Research. - 1996. - Vol. 18, Is. 7. - С. 129-132. - ISSN 02731177 (ISSN) , DOI 10.1016/0273-1177(95)00955-8
Ключевые слова (''Своб.индексиров.''): chlorophyll concentration--chlorophylls--czcs--ocean chlorophyll concentration--phytopigment dynamics--productivity--quasistationary areas--remote sensing--satellite data--seasonal changes--world ocean
Аннотация: To estimate the seasonal progress of the production process over the planet and its long-standing trend it is important to measure not only the spatial distributions of pigment that represent the rates of photosynthesis but also their time variability. Anthropogenic impact on natural complexes can be efficiently estimated by satellite observations of phytopigment dynamics. This study presents CZCS satellite data processed to reveal spatial inhomogeneity in the seasonal course of chlorophyll concentration in the world ocean on a global scale. Areas with quasistationary and non-stationary seasonal changes in chlorophyll concentration are revealed for the 7.5 years period of CZCS operation. Areas in the world ocean with maximum absolute and relative differences in chlorophyll concentration during different seasons were found. Results are illustrated with a chart of areas in the Atlantic Ocean discerned by dynamic parameters.
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10.

Вид документа : Статья из журнала
Шифр издания :
Автор(ы) : Shevyrnogov A., Vysotskaya G.
Заглавие : Long-term dynamics of chlorophyll concentration in the ocean surface layer (by space data)
Место публикации : Advances in Space Research. - 2007. - Vol. 39, Is. 1. - С. 197-202. - ISSN 02731177 (ISSN) , DOI 10.1016/j.asr.2006.10.015
Ключевые слова (''Своб.индексиров.''): dynamics--ocean--phytopigment--climatology--concentration (process)--hydrology--marine biology--ocean currents--plants (botany)--biosphere--ocean--phytopigments--chlorophyll
Аннотация: To preserve the biosphere and to use it efficiently, it is necessary to gain a deep insight into the dynamics of the primary production process on our planet. Variability of chlorophyll concentration in the ocean is one of the most important components of this process. These investigations are, however, very labor-consuming, because of the difficulties related to the accessibility of the water surface and its large size. In this work long-term changes in chlorophyll concentration in the surface layer of the ocean have been analyzed on the basis of the CZCS data for 7.5 years from 1979 to 1986 and the SeaWiFS data from 1997 to 2004. It has been shown that the average chlorophyll concentration calculated in all investigated areas varies moderately. However, when analyzing spatially local trends, the areas have been detected that have significant rise and fall of chlorophyll concentrations. Some interesting features of the long-term dynamics of chlorophyll concentration have been found. The opposite directions of long-term trends (essential increase or decrease) cannot be explained only by large-scale hydrological phenomena in the ocean (currents, upwellings, etc.). The measured chlorophyll concentration results from the balance between production and destruction processes. Which process dominates is determined by various hydrophysical, hydrobiological, and climatic processes, leading to sharp rises or falls of the concentration. It is important to estimate the scale of the areas in which this or that process dominates. Therefore, the study addresses not only the dynamics of the mean value but also the dynamics of the areas in which the dominance of certain factors has led to a sharp fall or rise in chlorophyll concentration. Thus, the obtained results can be used to estimate long-term changes in the ocean biota. В© 2006 COSPAR.
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