Seasonal and interannual variation in evapotranspiration, energy balance and surface conductance in a northern temperate grassland
The eddy covariance technique was used to measure evapotranspiration and sensible heat flux continuously for 2.5 years (three growing seasons) in a northern grassland near Lethbridge, Alta., Canada. The 1999 growing season had precipitation (226.9 mm) near the 30-year average value (1971–2000; 206.4...
Gespeichert in:
| Veröffentlicht in: | Agricultural and forest meteorology 2002-07, Vol.112 (1), p.31-49 |
|---|---|
| Hauptverfasser: | , , |
| Format: | Artikel |
| Sprache: | eng |
| Schlagworte: | |
| Online-Zugang: | Volltext |
| Tags: |
Tag hinzufügen
Keine Tags, Fügen Sie den ersten Tag hinzu!
|
| container_end_page | 49 |
|---|---|
| container_issue | 1 |
| container_start_page | 31 |
| container_title | Agricultural and forest meteorology |
| container_volume | 112 |
| creator | Wever, Linda A Flanagan, Lawrence B Carlson, Peter J |
| description | The eddy covariance technique was used to measure evapotranspiration and sensible heat flux continuously for 2.5 years (three growing seasons) in a northern grassland near Lethbridge, Alta., Canada. The 1999 growing season had precipitation (226.9
mm) near the 30-year average value (1971–2000; 206.4±77.5; mean±S.D.). In contrast, the 1998 growing season precipitation (295.3
mm) was significantly above average and almost four times greater than the 2000 growing season precipitation (75.1
mm), which was significantly below average. The 1998 growing season had higher peak evapotranspiration (4.5
mm per day) than values observed in 1999 and 2000, when the highest evapotranspiration was approximately 3
mm per day. Evapotranspiration during the winter periods was normally |
| doi_str_mv | 10.1016/S0168-1923(02)00041-2 |
| format | Article |
| fullrecord | <record><control><sourceid>proquest_cross</sourceid><recordid>TN_cdi_proquest_miscellaneous_18596623</recordid><sourceformat>XML</sourceformat><sourcesystem>PC</sourcesystem><els_id>S0168192302000412</els_id><sourcerecordid>18596623</sourcerecordid><originalsourceid>FETCH-LOGICAL-c517t-ff8013dfa1fc7c77fef9dd8d9dc90e5bdfebbd28f3bfb5dcbf76da208ecb125e3</originalsourceid><addsrcrecordid>eNqFUUtLHTEYDUWh18dPEGajVOhoHvNclXKxtiC4UNfhm-SLTZmbTJPMBbf95ebOlbp0k8fJOd8J5xByxugVo6y5fshLV7Keiy-UX1JKK1byT2TFulaUnFf0gKz-Uz6Toxj_UMp42_Yr8u8BIXoHYwFOF9YlDODcnO9bCBaS9S6jBW5h8ik_xcmGBf1aoMPw_FIMMIJTuOjjHAzks_JOzyoteFZD4XxIvzG4IuFmyhYJi-cAMWapPiGHBsaIp2_7MXn6cfO4_lne3d_-Wn-_K1XN2lQa01EmtAFmVKva1qDpte50r1VPsR60wWHQvDNiMEOt1WDaRgOnHaqB8RrFMbnYz52C_ztjTHJjo8Ix_wH9HCXr6r5puPiYWDW86kWVifWeqIKPMaCRU7AbCC-SUbmrRi7VyF3uknK5VCN51p2_GUBUMJqcq7LxXSw6VnHBMu_bnoc5lq3FIKOymEPVNqBKUnv7gdMrU_yoEg</addsrcrecordid><sourcetype>Aggregation Database</sourcetype><iscdi>true</iscdi><recordtype>article</recordtype><pqid>14624934</pqid></control><display><type>article</type><title>Seasonal and interannual variation in evapotranspiration, energy balance and surface conductance in a northern temperate grassland</title><source>Access via ScienceDirect (Elsevier)</source><creator>Wever, Linda A ; Flanagan, Lawrence B ; Carlson, Peter J</creator><creatorcontrib>Wever, Linda A ; Flanagan, Lawrence B ; Carlson, Peter J</creatorcontrib><description>The eddy covariance technique was used to measure evapotranspiration and sensible heat flux continuously for 2.5 years (three growing seasons) in a northern grassland near Lethbridge, Alta., Canada. The 1999 growing season had precipitation (226.9
mm) near the 30-year average value (1971–2000; 206.4±77.5; mean±S.D.). In contrast, the 1998 growing season precipitation (295.3
mm) was significantly above average and almost four times greater than the 2000 growing season precipitation (75.1
mm), which was significantly below average. The 1998 growing season had higher peak evapotranspiration (4.5
mm per day) than values observed in 1999 and 2000, when the highest evapotranspiration was approximately 3
mm per day. Evapotranspiration during the winter periods was normally <0.5
mm per day. In 1998, maximum latent heat flux was higher than sensible heat flux during June and early July. In contrast, sensible heat flux dominated the energy budget at midday during the entire 1999 and 2000 growing seasons. The soil heat flux component was quite similar during all 3 years, with maximum daily values reaching approximately 80–100
W
m
−2. The decoupling coefficient (ranged between 0.2 and 0.3) indicated that evapotranspiration was strongly controlled by surface conductance in this grassland. The highest
λE/
λE
eq values (0.7–0.8) occurred in June and July 1998, before the exhaustion of soil moisture reduced values to <0.4 in late August. Lower values were recorded in 1999 and 2000, often below 0.5. A non-linear model of surface conductance that included functions for vapor pressure deficit, photon flux density, and available soil moisture explained a large proportion of the variation in the surface conductance data. To model surface conductance accurately, separate model coefficients need to be used for the different years. Therefore, our data indicate that evapotranspiration and its physiological control vary in response to interannual changes in precipitation.</description><identifier>ISSN: 0168-1923</identifier><identifier>EISSN: 1873-2240</identifier><identifier>DOI: 10.1016/S0168-1923(02)00041-2</identifier><identifier>CODEN: AFMEEB</identifier><language>eng</language><publisher>Amsterdam: Elsevier B.V</publisher><subject>Agricultural and forest climatology and meteorology. Irrigation. Drainage ; Agricultural and forest meteorology ; Agronomy. Soil science and plant productions ; Biological and medical sciences ; Climatology, meteorology ; Eddy covariance ; Energy balance ; Evapotranspiration ; Fundamental and applied biological sciences. Psychology ; General agronomy. Plant production ; Generalities. Techniques. Climatology. Meteorology. Climatic models of plant production ; Grassland ; Surface conductance</subject><ispartof>Agricultural and forest meteorology, 2002-07, Vol.112 (1), p.31-49</ispartof><rights>2002 Elsevier Science B.V.</rights><rights>2002 INIST-CNRS</rights><lds50>peer_reviewed</lds50><woscitedreferencessubscribed>false</woscitedreferencessubscribed><citedby>FETCH-LOGICAL-c517t-ff8013dfa1fc7c77fef9dd8d9dc90e5bdfebbd28f3bfb5dcbf76da208ecb125e3</citedby><cites>FETCH-LOGICAL-c517t-ff8013dfa1fc7c77fef9dd8d9dc90e5bdfebbd28f3bfb5dcbf76da208ecb125e3</cites></display><links><openurl>$$Topenurl_article</openurl><openurlfulltext>$$Topenurlfull_article</openurlfulltext><thumbnail>$$Tsyndetics_thumb_exl</thumbnail><linktohtml>$$Uhttps://dx.doi.org/10.1016/S0168-1923(02)00041-2$$EHTML$$P50$$Gelsevier$$H</linktohtml><link.rule.ids>314,780,784,3550,27924,27925,45995</link.rule.ids><backlink>$$Uhttp://pascal-francis.inist.fr/vibad/index.php?action=getRecordDetail&idt=13814231$$DView record in Pascal Francis$$Hfree_for_read</backlink></links><search><creatorcontrib>Wever, Linda A</creatorcontrib><creatorcontrib>Flanagan, Lawrence B</creatorcontrib><creatorcontrib>Carlson, Peter J</creatorcontrib><title>Seasonal and interannual variation in evapotranspiration, energy balance and surface conductance in a northern temperate grassland</title><title>Agricultural and forest meteorology</title><description>The eddy covariance technique was used to measure evapotranspiration and sensible heat flux continuously for 2.5 years (three growing seasons) in a northern grassland near Lethbridge, Alta., Canada. The 1999 growing season had precipitation (226.9
mm) near the 30-year average value (1971–2000; 206.4±77.5; mean±S.D.). In contrast, the 1998 growing season precipitation (295.3
mm) was significantly above average and almost four times greater than the 2000 growing season precipitation (75.1
mm), which was significantly below average. The 1998 growing season had higher peak evapotranspiration (4.5
mm per day) than values observed in 1999 and 2000, when the highest evapotranspiration was approximately 3
mm per day. Evapotranspiration during the winter periods was normally <0.5
mm per day. In 1998, maximum latent heat flux was higher than sensible heat flux during June and early July. In contrast, sensible heat flux dominated the energy budget at midday during the entire 1999 and 2000 growing seasons. The soil heat flux component was quite similar during all 3 years, with maximum daily values reaching approximately 80–100
W
m
−2. The decoupling coefficient (ranged between 0.2 and 0.3) indicated that evapotranspiration was strongly controlled by surface conductance in this grassland. The highest
λE/
λE
eq values (0.7–0.8) occurred in June and July 1998, before the exhaustion of soil moisture reduced values to <0.4 in late August. Lower values were recorded in 1999 and 2000, often below 0.5. A non-linear model of surface conductance that included functions for vapor pressure deficit, photon flux density, and available soil moisture explained a large proportion of the variation in the surface conductance data. To model surface conductance accurately, separate model coefficients need to be used for the different years. Therefore, our data indicate that evapotranspiration and its physiological control vary in response to interannual changes in precipitation.</description><subject>Agricultural and forest climatology and meteorology. Irrigation. Drainage</subject><subject>Agricultural and forest meteorology</subject><subject>Agronomy. Soil science and plant productions</subject><subject>Biological and medical sciences</subject><subject>Climatology, meteorology</subject><subject>Eddy covariance</subject><subject>Energy balance</subject><subject>Evapotranspiration</subject><subject>Fundamental and applied biological sciences. Psychology</subject><subject>General agronomy. Plant production</subject><subject>Generalities. Techniques. Climatology. Meteorology. Climatic models of plant production</subject><subject>Grassland</subject><subject>Surface conductance</subject><issn>0168-1923</issn><issn>1873-2240</issn><fulltext>true</fulltext><rsrctype>article</rsrctype><creationdate>2002</creationdate><recordtype>article</recordtype><recordid>eNqFUUtLHTEYDUWh18dPEGajVOhoHvNclXKxtiC4UNfhm-SLTZmbTJPMBbf95ebOlbp0k8fJOd8J5xByxugVo6y5fshLV7Keiy-UX1JKK1byT2TFulaUnFf0gKz-Uz6Toxj_UMp42_Yr8u8BIXoHYwFOF9YlDODcnO9bCBaS9S6jBW5h8ik_xcmGBf1aoMPw_FIMMIJTuOjjHAzks_JOzyoteFZD4XxIvzG4IuFmyhYJi-cAMWapPiGHBsaIp2_7MXn6cfO4_lne3d_-Wn-_K1XN2lQa01EmtAFmVKva1qDpte50r1VPsR60wWHQvDNiMEOt1WDaRgOnHaqB8RrFMbnYz52C_ztjTHJjo8Ix_wH9HCXr6r5puPiYWDW86kWVifWeqIKPMaCRU7AbCC-SUbmrRi7VyF3uknK5VCN51p2_GUBUMJqcq7LxXSw6VnHBMu_bnoc5lq3FIKOymEPVNqBKUnv7gdMrU_yoEg</recordid><startdate>20020731</startdate><enddate>20020731</enddate><creator>Wever, Linda A</creator><creator>Flanagan, Lawrence B</creator><creator>Carlson, Peter J</creator><general>Elsevier B.V</general><general>Elsevier</general><scope>IQODW</scope><scope>AAYXX</scope><scope>CITATION</scope><scope>7ST</scope><scope>C1K</scope><scope>SOI</scope><scope>7TG</scope><scope>7UA</scope><scope>KL.</scope></search><sort><creationdate>20020731</creationdate><title>Seasonal and interannual variation in evapotranspiration, energy balance and surface conductance in a northern temperate grassland</title><author>Wever, Linda A ; Flanagan, Lawrence B ; Carlson, Peter J</author></sort><facets><frbrtype>5</frbrtype><frbrgroupid>cdi_FETCH-LOGICAL-c517t-ff8013dfa1fc7c77fef9dd8d9dc90e5bdfebbd28f3bfb5dcbf76da208ecb125e3</frbrgroupid><rsrctype>articles</rsrctype><prefilter>articles</prefilter><language>eng</language><creationdate>2002</creationdate><topic>Agricultural and forest climatology and meteorology. Irrigation. Drainage</topic><topic>Agricultural and forest meteorology</topic><topic>Agronomy. Soil science and plant productions</topic><topic>Biological and medical sciences</topic><topic>Climatology, meteorology</topic><topic>Eddy covariance</topic><topic>Energy balance</topic><topic>Evapotranspiration</topic><topic>Fundamental and applied biological sciences. Psychology</topic><topic>General agronomy. Plant production</topic><topic>Generalities. Techniques. Climatology. Meteorology. Climatic models of plant production</topic><topic>Grassland</topic><topic>Surface conductance</topic><toplevel>peer_reviewed</toplevel><toplevel>online_resources</toplevel><creatorcontrib>Wever, Linda A</creatorcontrib><creatorcontrib>Flanagan, Lawrence B</creatorcontrib><creatorcontrib>Carlson, Peter J</creatorcontrib><collection>Pascal-Francis</collection><collection>CrossRef</collection><collection>Environment Abstracts</collection><collection>Environmental Sciences and Pollution Management</collection><collection>Environment Abstracts</collection><collection>Meteorological & Geoastrophysical Abstracts</collection><collection>Water Resources Abstracts</collection><collection>Meteorological & Geoastrophysical Abstracts - Academic</collection><jtitle>Agricultural and forest meteorology</jtitle></facets><delivery><delcategory>Remote Search Resource</delcategory><fulltext>fulltext</fulltext></delivery><addata><au>Wever, Linda A</au><au>Flanagan, Lawrence B</au><au>Carlson, Peter J</au><format>journal</format><genre>article</genre><ristype>JOUR</ristype><atitle>Seasonal and interannual variation in evapotranspiration, energy balance and surface conductance in a northern temperate grassland</atitle><jtitle>Agricultural and forest meteorology</jtitle><date>2002-07-31</date><risdate>2002</risdate><volume>112</volume><issue>1</issue><spage>31</spage><epage>49</epage><pages>31-49</pages><issn>0168-1923</issn><eissn>1873-2240</eissn><coden>AFMEEB</coden><abstract>The eddy covariance technique was used to measure evapotranspiration and sensible heat flux continuously for 2.5 years (three growing seasons) in a northern grassland near Lethbridge, Alta., Canada. The 1999 growing season had precipitation (226.9
mm) near the 30-year average value (1971–2000; 206.4±77.5; mean±S.D.). In contrast, the 1998 growing season precipitation (295.3
mm) was significantly above average and almost four times greater than the 2000 growing season precipitation (75.1
mm), which was significantly below average. The 1998 growing season had higher peak evapotranspiration (4.5
mm per day) than values observed in 1999 and 2000, when the highest evapotranspiration was approximately 3
mm per day. Evapotranspiration during the winter periods was normally <0.5
mm per day. In 1998, maximum latent heat flux was higher than sensible heat flux during June and early July. In contrast, sensible heat flux dominated the energy budget at midday during the entire 1999 and 2000 growing seasons. The soil heat flux component was quite similar during all 3 years, with maximum daily values reaching approximately 80–100
W
m
−2. The decoupling coefficient (ranged between 0.2 and 0.3) indicated that evapotranspiration was strongly controlled by surface conductance in this grassland. The highest
λE/
λE
eq values (0.7–0.8) occurred in June and July 1998, before the exhaustion of soil moisture reduced values to <0.4 in late August. Lower values were recorded in 1999 and 2000, often below 0.5. A non-linear model of surface conductance that included functions for vapor pressure deficit, photon flux density, and available soil moisture explained a large proportion of the variation in the surface conductance data. To model surface conductance accurately, separate model coefficients need to be used for the different years. Therefore, our data indicate that evapotranspiration and its physiological control vary in response to interannual changes in precipitation.</abstract><cop>Amsterdam</cop><cop>Oxford</cop><cop>New York, NY</cop><pub>Elsevier B.V</pub><doi>10.1016/S0168-1923(02)00041-2</doi><tpages>19</tpages></addata></record> |
| fulltext | fulltext |
| identifier | ISSN: 0168-1923 |
| ispartof | Agricultural and forest meteorology, 2002-07, Vol.112 (1), p.31-49 |
| issn | 0168-1923 1873-2240 |
| language | eng |
| recordid | cdi_proquest_miscellaneous_18596623 |
| source | Access via ScienceDirect (Elsevier) |
| subjects | Agricultural and forest climatology and meteorology. Irrigation. Drainage Agricultural and forest meteorology Agronomy. Soil science and plant productions Biological and medical sciences Climatology, meteorology Eddy covariance Energy balance Evapotranspiration Fundamental and applied biological sciences. Psychology General agronomy. Plant production Generalities. Techniques. Climatology. Meteorology. Climatic models of plant production Grassland Surface conductance |
| title | Seasonal and interannual variation in evapotranspiration, energy balance and surface conductance in a northern temperate grassland |
| url | https://sfx.bib-bvb.de/sfx_tum?ctx_ver=Z39.88-2004&ctx_enc=info:ofi/enc:UTF-8&ctx_tim=2024-12-20T18%3A50%3A48IST&url_ver=Z39.88-2004&url_ctx_fmt=infofi/fmt:kev:mtx:ctx&rfr_id=info:sid/primo.exlibrisgroup.com:primo3-Article-proquest_cross&rft_val_fmt=info:ofi/fmt:kev:mtx:journal&rft.genre=article&rft.atitle=Seasonal%20and%20interannual%20variation%20in%20evapotranspiration,%20energy%20balance%20and%20surface%20conductance%20in%20a%20northern%20temperate%20grassland&rft.jtitle=Agricultural%20and%20forest%20meteorology&rft.au=Wever,%20Linda%20A&rft.date=2002-07-31&rft.volume=112&rft.issue=1&rft.spage=31&rft.epage=49&rft.pages=31-49&rft.issn=0168-1923&rft.eissn=1873-2240&rft.coden=AFMEEB&rft_id=info:doi/10.1016/S0168-1923(02)00041-2&rft_dat=%3Cproquest_cross%3E18596623%3C/proquest_cross%3E%3Curl%3E%3C/url%3E&disable_directlink=true&sfx.directlink=off&sfx.report_link=0&rft_id=info:oai/&rft_pqid=14624934&rft_id=info:pmid/&rft_els_id=S0168192302000412&rfr_iscdi=true |