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Interannual summer streamflow variability over Romania and its connection to large‐scale atmospheric circulation
ABSTRACT In this study, the spatial and temporal variability of summer (June–July–August, JJA) streamflow over Romania, as recorded at 46 hydrological stations over the period 1935–2010 is analysed. An empirical orthogonal function analysis and a canonical correlation analysis (CCA) were used to cha...
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Published in: | International journal of climatology 2015-11, Vol.35 (14), p.4186-4196 |
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description | ABSTRACT
In this study, the spatial and temporal variability of summer (June–July–August, JJA) streamflow over Romania, as recorded at 46 hydrological stations over the period 1935–2010 is analysed. An empirical orthogonal function analysis and a canonical correlation analysis (CCA) were used to characterize the spatial and temporal variability of summer streamflow and its relationship with large‐scale atmospheric factors. The dominant summer mode captures in‐phase variability of river flow anomalies over the entire country, while the second mode of variability is characterized by a northwest–southeast dipole, emphasizing the influence of topography over the streamflow variability. Based on a CCA analysis, more than 50% of the summer streamflow variability is shown to be influenced by cloud cover and summer temperatures, via the modulation of precipitation and potential evapotranspiration. In general, positive (negative) streamflow anomalies, at country level, are associated with cyclonic (anticyclonic) circulation, the advection of moist (warm and dry) air, enhanced (reduced) precipitation and positive (negative) cloud cover anomalies. |
doi_str_mv | 10.1002/joc.4278 |
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In this study, the spatial and temporal variability of summer (June–July–August, JJA) streamflow over Romania, as recorded at 46 hydrological stations over the period 1935–2010 is analysed. An empirical orthogonal function analysis and a canonical correlation analysis (CCA) were used to characterize the spatial and temporal variability of summer streamflow and its relationship with large‐scale atmospheric factors. The dominant summer mode captures in‐phase variability of river flow anomalies over the entire country, while the second mode of variability is characterized by a northwest–southeast dipole, emphasizing the influence of topography over the streamflow variability. Based on a CCA analysis, more than 50% of the summer streamflow variability is shown to be influenced by cloud cover and summer temperatures, via the modulation of precipitation and potential evapotranspiration. In general, positive (negative) streamflow anomalies, at country level, are associated with cyclonic (anticyclonic) circulation, the advection of moist (warm and dry) air, enhanced (reduced) precipitation and positive (negative) cloud cover anomalies.</description><identifier>ISSN: 0899-8418</identifier><identifier>EISSN: 1097-0088</identifier><identifier>DOI: 10.1002/joc.4278</identifier><language>eng</language><publisher>Chichester, UK: John Wiley & Sons, Ltd</publisher><subject>atmospheric circulation ; canonical correlation analysis ; empirical orthogonal functions ; Freshwater ; Rivers ; Romania ; Stream flow ; streamflow variability</subject><ispartof>International journal of climatology, 2015-11, Vol.35 (14), p.4186-4196</ispartof><rights>2015 Royal Meteorological Society</rights><lds50>peer_reviewed</lds50><oa>free_for_read</oa><woscitedreferencessubscribed>false</woscitedreferencessubscribed><citedby>FETCH-LOGICAL-c4308-913bf273158ee06dbbfd0a3dedd9a252b61134a0d07cdffa0b56b0b7514e97b53</citedby><cites>FETCH-LOGICAL-c4308-913bf273158ee06dbbfd0a3dedd9a252b61134a0d07cdffa0b56b0b7514e97b53</cites></display><links><openurl>$$Topenurl_article</openurl><openurlfulltext>$$Topenurlfull_article</openurlfulltext><thumbnail>$$Tsyndetics_thumb_exl</thumbnail><link.rule.ids>314,780,784,27924,27925</link.rule.ids></links><search><creatorcontrib>Ionita, M.</creatorcontrib><title>Interannual summer streamflow variability over Romania and its connection to large‐scale atmospheric circulation</title><title>International journal of climatology</title><description>ABSTRACT
In this study, the spatial and temporal variability of summer (June–July–August, JJA) streamflow over Romania, as recorded at 46 hydrological stations over the period 1935–2010 is analysed. An empirical orthogonal function analysis and a canonical correlation analysis (CCA) were used to characterize the spatial and temporal variability of summer streamflow and its relationship with large‐scale atmospheric factors. The dominant summer mode captures in‐phase variability of river flow anomalies over the entire country, while the second mode of variability is characterized by a northwest–southeast dipole, emphasizing the influence of topography over the streamflow variability. Based on a CCA analysis, more than 50% of the summer streamflow variability is shown to be influenced by cloud cover and summer temperatures, via the modulation of precipitation and potential evapotranspiration. In general, positive (negative) streamflow anomalies, at country level, are associated with cyclonic (anticyclonic) circulation, the advection of moist (warm and dry) air, enhanced (reduced) precipitation and positive (negative) cloud cover anomalies.</description><subject>atmospheric circulation</subject><subject>canonical correlation analysis</subject><subject>empirical orthogonal functions</subject><subject>Freshwater</subject><subject>Rivers</subject><subject>Romania</subject><subject>Stream flow</subject><subject>streamflow variability</subject><issn>0899-8418</issn><issn>1097-0088</issn><fulltext>true</fulltext><rsrctype>article</rsrctype><creationdate>2015</creationdate><recordtype>article</recordtype><recordid>eNp10M9KJDEQBvAgu-CsK_gIAS9eWivdnenkKMP-UQRBds9NJV2tGdLJmHQrc_MR9hH2WXyUfRJ7VmFhwVMd6lcfxcfYkYBTAVCeraM9rctG7bGFAN0UAEp9YAtQWheqFmqffcp5DQBai-WC5YswUsIQJvQ8T8NAiecxEQ69j4_8AZND47wbtzw-zLubOGBwyDF0z7_dmLmNIZAdXQx8jNxjuqU_T7-yRU8cxyHmzR0lZ7l1yU4ed_Az-9ijz3T4Ng_Yz69ffqy-F1fX3y5W51eFrStQhRaV6cumElIRwbIzpu8Aq466TmMpS7MUoqoROmhs1_cIRi4NmEaKmnRjZHXATl5zNyneT5THdnDZkvcYKE65FY0CKZSQO3r8H13HKYX5u1nJRpa6hvpfoE0x50R9u0luwLRtBbS79ucr2-7an2nxSh-dp-27rr28Xv31L5Wbijw</recordid><startdate>20151130</startdate><enddate>20151130</enddate><creator>Ionita, M.</creator><general>John Wiley & Sons, Ltd</general><general>Wiley Subscription Services, Inc</general><scope>AAYXX</scope><scope>CITATION</scope><scope>7TG</scope><scope>7TN</scope><scope>F1W</scope><scope>H96</scope><scope>KL.</scope><scope>L.G</scope><scope>7UA</scope><scope>C1K</scope></search><sort><creationdate>20151130</creationdate><title>Interannual summer streamflow variability over Romania and its connection to large‐scale atmospheric circulation</title><author>Ionita, M.</author></sort><facets><frbrtype>5</frbrtype><frbrgroupid>cdi_FETCH-LOGICAL-c4308-913bf273158ee06dbbfd0a3dedd9a252b61134a0d07cdffa0b56b0b7514e97b53</frbrgroupid><rsrctype>articles</rsrctype><prefilter>articles</prefilter><language>eng</language><creationdate>2015</creationdate><topic>atmospheric circulation</topic><topic>canonical correlation analysis</topic><topic>empirical orthogonal functions</topic><topic>Freshwater</topic><topic>Rivers</topic><topic>Romania</topic><topic>Stream flow</topic><topic>streamflow variability</topic><toplevel>peer_reviewed</toplevel><toplevel>online_resources</toplevel><creatorcontrib>Ionita, M.</creatorcontrib><collection>CrossRef</collection><collection>Meteorological & Geoastrophysical Abstracts</collection><collection>Oceanic Abstracts</collection><collection>ASFA: Aquatic Sciences and Fisheries Abstracts</collection><collection>Aquatic Science & Fisheries Abstracts (ASFA) 2: Ocean Technology, Policy & Non-Living Resources</collection><collection>Meteorological & Geoastrophysical Abstracts - Academic</collection><collection>Aquatic Science & Fisheries Abstracts (ASFA) Professional</collection><collection>Water Resources Abstracts</collection><collection>Environmental Sciences and Pollution Management</collection><jtitle>International journal of climatology</jtitle></facets><delivery><delcategory>Remote Search Resource</delcategory><fulltext>fulltext</fulltext></delivery><addata><au>Ionita, M.</au><format>journal</format><genre>article</genre><ristype>JOUR</ristype><atitle>Interannual summer streamflow variability over Romania and its connection to large‐scale atmospheric circulation</atitle><jtitle>International journal of climatology</jtitle><date>2015-11-30</date><risdate>2015</risdate><volume>35</volume><issue>14</issue><spage>4186</spage><epage>4196</epage><pages>4186-4196</pages><issn>0899-8418</issn><eissn>1097-0088</eissn><abstract>ABSTRACT
In this study, the spatial and temporal variability of summer (June–July–August, JJA) streamflow over Romania, as recorded at 46 hydrological stations over the period 1935–2010 is analysed. An empirical orthogonal function analysis and a canonical correlation analysis (CCA) were used to characterize the spatial and temporal variability of summer streamflow and its relationship with large‐scale atmospheric factors. The dominant summer mode captures in‐phase variability of river flow anomalies over the entire country, while the second mode of variability is characterized by a northwest–southeast dipole, emphasizing the influence of topography over the streamflow variability. Based on a CCA analysis, more than 50% of the summer streamflow variability is shown to be influenced by cloud cover and summer temperatures, via the modulation of precipitation and potential evapotranspiration. In general, positive (negative) streamflow anomalies, at country level, are associated with cyclonic (anticyclonic) circulation, the advection of moist (warm and dry) air, enhanced (reduced) precipitation and positive (negative) cloud cover anomalies.</abstract><cop>Chichester, UK</cop><pub>John Wiley & Sons, Ltd</pub><doi>10.1002/joc.4278</doi><tpages>11</tpages><oa>free_for_read</oa></addata></record> |
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subjects | atmospheric circulation canonical correlation analysis empirical orthogonal functions Freshwater Rivers Romania Stream flow streamflow variability |
title | Interannual summer streamflow variability over Romania and its connection to large‐scale atmospheric circulation |
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