caa a22 4500 475777697 CHVBK 20180406123635.0 cr unu---uuuuu 170329e20000501xx s 000 0 eng 10.1023/A:1002678429212 doi (NATIONALLICENCE)springer-10.1023/A:1002678429212 Stability Effects on Heat and Moisture Fluxes at Sea [Elektronische Daten] [W.A. Oost, C.M.J. Jacobs, C. Van Oort] During the 1996 ASGAMAGE experiment we measured windspeed, air temperature Ta, watertemperature Ts, humidity and the momentum,heat and moisture fluxes at a research platform offthe Dutch coast. For each quantity we used several(sets of) instruments simultaneously. This allowed usto make an extensive assessment of the quality of themeasurements and to find optimal values for thevarious quantities for each run. From these values wecalculated CH and CE, theStanton and Dalton numbers, and reduced them to 10-mheight and neutral conditions. For this reductionwe made a separate analysis for the effect ofinclusion or non-inclusion of the assumption that theroughness length for heat or moisture is the same forthe neutral and non-neutral cases. Differences inthe reduced data due to this assumption turned out tobe well within the measurement error. For CH we distinguished three separategroups of data: stable (A), unstable withθa ≶ θs (B) and unstablewith thetas;a > θs (C), withθ indicating the potential temperature.The stable data separate into two groups, depending onwater temperature and/or the wave field. The data ofgroup B showed a relation with wave age. The data ofgroup C consistently gave negative values forCH, a result that might indicate conversion oflatent heat into sensible heat through condensation ofwater vapour just above the water surface. An attemptto re-analyse the data in terms of density fluxes,combining the effects of heat and moisture, still gavenegative transfer coefficients for group C. For the moisture flux we found the more conventionalresult of a separation in stable and unstable values;these categories showed a clear difference, but notrends with, for example, wind speed.We conclude that standard Monin-Obukhov similaritytheory cannot explain our data. Kluwer Academic Publishers, 2000 Air-sea interaction nationallicence Atmospheric stability nationallicence Heat flux nationallicence Latent heat nationallicence Moisture flux nationallicence Oost W.A. Royal Netherlands Meteorological Institute (KNMI), de Bilt, The Netherlands aut Jacobs C.M.J. Royal Netherlands Meteorological Institute (KNMI), de Bilt, The Netherlands aut Van Oort C. Royal Netherlands Meteorological Institute (KNMI), de Bilt, The Netherlands aut Boundary-Layer Meteorology Kluwer Academic Publishers 95/2(2000-05-01), 271-302 0006-8314 95:2<271 2000 95 10546 https://doi.org/10.1023/A:1002678429212 text/html Onlinezugriff via DOI 1 research-article jats NATIONALLICENCE 856 40 https://doi.org/10.1023/A:1002678429212 text/html Onlinezugriff via DOI NATIONALLICENCE 700 1- Oost W.A. Royal Netherlands Meteorological Institute (KNMI), de Bilt, The Netherlands aut NATIONALLICENCE 700 1- Jacobs C.M.J. Royal Netherlands Meteorological Institute (KNMI), de Bilt, The Netherlands aut NATIONALLICENCE 700 1- Van Oort C. Royal Netherlands Meteorological Institute (KNMI), de Bilt, The Netherlands aut NATIONALLICENCE 773 0- Boundary-Layer Meteorology Kluwer Academic Publishers 95/2(2000-05-01), 271-302 0006-8314 95:2<271 2000 95 10546 Metadata rights reserved Springer special CC-BY-NC licence nationallicence SWISSBIB 337892679 BK010053 XK010053 XK010000 NATIONALLICENCE NATIONALLICENCE NL-springer