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Two ASCAT and three SeaWinds products are compared in nine regions (classified as rainy or dry) in the tropical Pacific between 10\u00b0S and 10\u00b0N and 140\u00b0 and 260\u00b0E for the period November 2008 to October 2009. Monthly and regionally averaged longitudinal and transverse structure functions are calculated using along\u2010track samples. To ease the analysis, the following quantities were estimated for the scale range 50 to 300 km and used to intercompare the wind products: (i) structure function slopes, (ii) turbulent kinetic energies (\n<jats:inline-graphic xmlns:xlink=\"http:\/\/www.w3.org\/1999\/xlink\" xlink:href=\"graphic\/jgrc21035-math-0001.png\" xlink:title=\"urn:x-wiley:21699275:media:jgrc21035:jgrc21035-math-0001\"\/>), and (iii) vorticity\u2010to\u2010divergence ratios. All wind products are in good qualitative agreement, but also have important differences. Structure function slopes and \n<jats:inline-graphic xmlns:xlink=\"http:\/\/www.w3.org\/1999\/xlink\" xlink:href=\"graphic\/jgrc21035-math-0002.png\" xlink:title=\"urn:x-wiley:21699275:media:jgrc21035:jgrc21035-math-0002\"\/> differ per wind product, but also show a common variation over time and space. Independent of wind product, longitudinal slopes decrease when sea surface temperature exceeds the threshold for onset of deep convection (about 28\u00b0C). In rainy areas and in dry regions during rainy periods, ASCAT has larger divergent \n<jats:inline-graphic xmlns:xlink=\"http:\/\/www.w3.org\/1999\/xlink\" xlink:href=\"graphic\/jgrc21035-math-0003.png\" xlink:title=\"urn:x-wiley:21699275:media:jgrc21035:jgrc21035-math-0003\"\/> than SeaWinds, while SeaWinds has larger vortical \n<jats:inline-graphic xmlns:xlink=\"http:\/\/www.w3.org\/1999\/xlink\" xlink:href=\"graphic\/jgrc21035-math-0004.png\" xlink:title=\"urn:x-wiley:21699275:media:jgrc21035:jgrc21035-math-0004\"\/> than ASCAT. Differences between SeaWinds and ASCAT vortical \n<jats:inline-graphic xmlns:xlink=\"http:\/\/www.w3.org\/1999\/xlink\" xlink:href=\"graphic\/jgrc21035-math-0005.png\" xlink:title=\"urn:x-wiley:21699275:media:jgrc21035:jgrc21035-math-0005\"\/> and vorticity\u2010to\u2010divergence ratios for the convectively active months of each region are large.<\/jats:p>","DOI":"10.1002\/2014jc009992","type":"journal-article","created":{"date-parts":[[2014,12,9]],"date-time":"2014-12-09T16:25:57Z","timestamp":1418142357000},"page":"362-383","source":"Crossref","is-referenced-by-count":13,"title":["Second\u2010order structure function analysis of scatterometer winds over the <scp>T<\/scp>ropical <scp>P<\/scp>acific"],"prefix":"10.1029","volume":"120","author":[{"given":"Gregory P.","family":"King","sequence":"first","affiliation":[{"name":"Centro de Geofisica\u2014IDL, Campo Grande, Edificio 8, Universidade de Lisboa Lisboa Portugal"},{"name":"Instituto Gulbenkian de Ciencia Oeiras Portugal"},{"name":"School of Marine Sciences, Nanjing University of Information Science and Technology Nanjing China"},{"name":"Institute of Marine Sciences (ICM-CSIC), Passeig Mar\u00edtim Barceloneta Barcelona Spain"}]},{"given":"Jur","family":"Vogelzang","sequence":"additional","affiliation":[{"name":"Royal Netherlands Meteorological Institute De Bilt Netherlands"}]},{"given":"Ad","family":"Stoffelen","sequence":"additional","affiliation":[{"name":"Royal Netherlands Meteorological Institute De Bilt Netherlands"}]}],"member":"13","published-online":{"date-parts":[[2015,1,28]]},"reference":[{"key":"e_1_2_8_2_1","doi-asserted-by":"publisher","DOI":"10.5270\/OceanObs09.cwp.08"},{"key":"e_1_2_8_3_1","doi-asserted-by":"publisher","DOI":"10.1175\/MWR-2861.1"},{"key":"e_1_2_8_4_1","doi-asserted-by":"publisher","DOI":"10.1029\/2002JC001330"},{"key":"e_1_2_8_5_1","volume-title":"QuikSCAT Science Data Product User's Manual","author":"Dunbar R. 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