Reducing Noise in the MSU Daily Lower-Tropospheric Global Temperature Dataset
The daily global-mean values of the lower-tropospheric temperature determined from microwave emissions measured by satellites are examined in terms of their signal, noise, and signal-to-noise ratio. Daily and 30-day average noise estimates are reduced by almost 50% and 35%, respectively, by analyzin...
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| Veröffentlicht in: | Journal of climate 1995-04, Vol.8 (4), p.888-896 |
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| container_end_page | 896 |
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| container_issue | 4 |
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| container_title | Journal of climate |
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| creator | Christy, John R. Spencer, Roy W. McNider, Richard T. |
| description | The daily global-mean values of the lower-tropospheric temperature determined from microwave emissions measured by satellites are examined in terms of their signal, noise, and signal-to-noise ratio. Daily and 30-day average noise estimates are reduced by almost 50% and 35%, respectively, by analyzing and adjusting (if necessary) for errors due to 1) missing data, 2) residual harmonics of the annual cycle unique to particular satellites, 3) lack of filtering, and 4) spurious trends. After adjustments, the decadal trend of the lower-tropospheric global temperature from January 1979 through February 1994 becomes −0.058°C, or about 0.03°C per decade cooler than previously calculated. |
| doi_str_mv | 10.1175/1520-0442(1995)008<0888:RNITMD>2.0.CO;2 |
| format | Article |
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Daily and 30-day average noise estimates are reduced by almost 50% and 35%, respectively, by analyzing and adjusting (if necessary) for errors due to 1) missing data, 2) residual harmonics of the annual cycle unique to particular satellites, 3) lack of filtering, and 4) spurious trends. After adjustments, the decadal trend of the lower-tropospheric global temperature from January 1979 through February 1994 becomes −0.058°C, or about 0.03°C per decade cooler than previously calculated.</description><subject>Artificial satellites</subject><subject>Datasets</subject><subject>Earth, ocean, space</subject><subject>Exact sciences and technology</subject><subject>External geophysics</subject><subject>Geophysics. Techniques, methods, instrumentation and models</subject><subject>Global climate models</subject><subject>Information retrieval noise</subject><subject>Noise reduction</subject><subject>Noise temperature</subject><subject>Satellite orbits</subject><subject>Signal noise</subject><subject>Statistical median</subject><subject>Time series</subject><issn>0894-8755</issn><issn>1520-0442</issn><fulltext>true</fulltext><rsrctype>article</rsrctype><creationdate>1995</creationdate><recordtype>article</recordtype><recordid>eNo9kF9LwzAUR4MoOP98BKEPIvrQeZM0baIiyNQpbA50PocsvdFKt9SkQ_z2tkz2dB_u4fzgEHJJYUhpIS6pYJBClrFzqpS4AJA3IKW8en15nk_vb9kQhqPZNdshgy25SwYgVZbKQoh9chDjFwBlOcCATF-xXNtq9ZG8-CpiUq2S9hOT6dt7cm-q-jeZ-B8M6Tz4xsfmE0Nlk3HtF6ZO5rhsMJh2HbBjWxOxPSJ7ztQRj__vIXl_fJiPntLJbPw8upukludZm0pnF6ByqbihpctEaRBcgZnLFxZ5royQZVFy51SpbMmZMW7BjQNLM4GCl_yQnG28TfDfa4ytXlbRYl2bFfp11FTSIs8z2YHjDWiDjzGg002olib8agq6z6n7SLqPpPucusup-5x6k1MzDXo006wznf5PmmhN7YJZ2SpudVywglPRYScb7Cu2PmzfLO_sigL_A50tgzs</recordid><startdate>19950401</startdate><enddate>19950401</enddate><creator>Christy, John R.</creator><creator>Spencer, Roy W.</creator><creator>McNider, Richard T.</creator><general>American Meteorological Society</general><scope>IQODW</scope><scope>AAYXX</scope><scope>CITATION</scope><scope>7TG</scope><scope>KL.</scope></search><sort><creationdate>19950401</creationdate><title>Reducing Noise in the MSU Daily Lower-Tropospheric Global Temperature Dataset</title><author>Christy, John R. ; Spencer, Roy W. ; McNider, Richard T.</author></sort><facets><frbrtype>5</frbrtype><frbrgroupid>cdi_FETCH-LOGICAL-c364t-8fcb096893a1df45dae0f7e4f6bce369a58d7d3ff9d9cd32aafb3af0c145e53d3</frbrgroupid><rsrctype>articles</rsrctype><prefilter>articles</prefilter><language>eng</language><creationdate>1995</creationdate><topic>Artificial satellites</topic><topic>Datasets</topic><topic>Earth, ocean, space</topic><topic>Exact sciences and technology</topic><topic>External geophysics</topic><topic>Geophysics. Techniques, methods, instrumentation and models</topic><topic>Global climate models</topic><topic>Information retrieval noise</topic><topic>Noise reduction</topic><topic>Noise temperature</topic><topic>Satellite orbits</topic><topic>Signal noise</topic><topic>Statistical median</topic><topic>Time series</topic><toplevel>peer_reviewed</toplevel><toplevel>online_resources</toplevel><creatorcontrib>Christy, John R.</creatorcontrib><creatorcontrib>Spencer, Roy W.</creatorcontrib><creatorcontrib>McNider, Richard T.</creatorcontrib><collection>Pascal-Francis</collection><collection>CrossRef</collection><collection>Meteorological & Geoastrophysical Abstracts</collection><collection>Meteorological & Geoastrophysical Abstracts - Academic</collection><jtitle>Journal of climate</jtitle></facets><delivery><delcategory>Remote Search Resource</delcategory><fulltext>fulltext</fulltext></delivery><addata><au>Christy, John R.</au><au>Spencer, Roy W.</au><au>McNider, Richard T.</au><format>journal</format><genre>article</genre><ristype>JOUR</ristype><atitle>Reducing Noise in the MSU Daily Lower-Tropospheric Global Temperature Dataset</atitle><jtitle>Journal of climate</jtitle><date>1995-04-01</date><risdate>1995</risdate><volume>8</volume><issue>4</issue><spage>888</spage><epage>896</epage><pages>888-896</pages><issn>0894-8755</issn><eissn>1520-0442</eissn><abstract>The daily global-mean values of the lower-tropospheric temperature determined from microwave emissions measured by satellites are examined in terms of their signal, noise, and signal-to-noise ratio. Daily and 30-day average noise estimates are reduced by almost 50% and 35%, respectively, by analyzing and adjusting (if necessary) for errors due to 1) missing data, 2) residual harmonics of the annual cycle unique to particular satellites, 3) lack of filtering, and 4) spurious trends. After adjustments, the decadal trend of the lower-tropospheric global temperature from January 1979 through February 1994 becomes −0.058°C, or about 0.03°C per decade cooler than previously calculated.</abstract><cop>Boston, MA</cop><pub>American Meteorological Society</pub><doi>10.1175/1520-0442(1995)008<0888:RNITMD>2.0.CO;2</doi><tpages>9</tpages><oa>free_for_read</oa></addata></record> |
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| ispartof | Journal of climate, 1995-04, Vol.8 (4), p.888-896 |
| issn | 0894-8755 1520-0442 |
| language | eng |
| recordid | cdi_proquest_miscellaneous_18176648 |
| source | Jstor Complete Legacy; American Meteorological Society; Elektronische Zeitschriftenbibliothek - Frei zugängliche E-Journals |
| subjects | Artificial satellites Datasets Earth, ocean, space Exact sciences and technology External geophysics Geophysics. Techniques, methods, instrumentation and models Global climate models Information retrieval noise Noise reduction Noise temperature Satellite orbits Signal noise Statistical median Time series |
| title | Reducing Noise in the MSU Daily Lower-Tropospheric Global Temperature Dataset |
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