PARAMETERIZATION OF SURFACE MOMENTUM FLUX DURING CONVECTIVE CONDITIONS

Article Sidebar

PDF
DOI: https://doi.org/10.29122/jstmc.v1i1.2103
Keywords:
Surface momentum flux

Main Article Content

Edi Santoso

Abstract

Parameterization of surface momentum flux estimates near-surface turbulent momentum fluxes from differences of mean wind speeds between the surface skin and the mid-mixed layer (ML). The rate of this turbulent transport is proportional to the product of a convective velocity times an empirical transport coefficient. To further investigate parameterization of surface momentum flux, some topics are discussed. New data from three different sites within Boundary Layer Experiment - 1996 (BLX96) are presented, and used to evaluate surface momentum flux parameterization. Old data from three other field programs (BLX83, Koorin, and TOGA-COARE) are re-analyzed to test this parameterization. Evidence from virtually all of these experiments indicates that the empirical transport coefficients for momentum fluxes depend on surface roughness.

Fluks momentum turbulen dekat permukaan dapat diestimasi dari selisih antara kecepatan angin di batas permukaan (surface skin) dan di bagian tengah lapisan tercampur (mid-mixed layer). Kecepatan dari transpor turbulen ini sebanding dengan perkalian antara koefisien empiris transpor dengan kecepatan konvektif. Untuk pengamatan lebih lanjut akan didiskusikan beberapa hal. Data baru dari hasil pengukuran BLX96 pada 3 lokasi yang berbeda akan digunakan untuk mengevaluasi parameterisasi ini. Sementara data yang diperoleh dari yang pernah dilakukan sebelumnya (BLX83, Koorin, and TOGA-COARE) digunakan untuk menguji hasil parameterisasi ini. Hasil yang diperoleh mengindikasikan bahwa koefisien empiris transpor untuk fluks momentum tergantung pada kekasaran permukaan (surface roughness).

Article Details

Issue
Vol. 1 No. 1 (2000): June 2000
Section
Articles

Authors who publish with this journal agree to the following terms:

a). Authors retain copyright and grant the journal the right of first publication with the work simultaneously licensed under a Creative Commons Attribution License that allows others to share the work with an acknowledgment of the work's authorship and initial publication in this journal.

b). Authors are able to enter into separate, additional contractual arrangements for the non-exclusive distribution of the journal's published version of the work (e.g., post it to an institutional repository or publish it in a book), with an acknowledgment of its initial publication in this journal.

c). Authors are permitted and encouraged to post their work online (e.g., in institutional repositories or on their website) prior to and during the submission process, as it can lead to productive exchanges, as well as earlier and greater citation of published work (See The Effect of Open Access).

d). Each author must sign the copyright transfer statement. The article will not be published unless this form has been signed and received.

OPEN ACCESS POLICY

Jurnal Sains & Teknologi Modifikasi Cuaca provides immediate open access to its content on the principle that making research freely available to the public supports a greater global exchange of knowledge.

JSTMC by BBTMC-BPPT is licensed under a Creative Commons Attribution-NonCommercial-ShareAlike 4.0 International License. Permissions beyond the scope of this license may be available at http://ejurnal.bppt.go.id/index.php/JSTMC