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Tomas Chor (UCLA) - Mixing in Oceanic...

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Upcoming Seminar

Tomas Chor (UCLA) - Mixing in Oceanic Boundary Layers: A Method to Guide Model Development

Wed, Jun 3, 2020

Zoom Seminar

Surface oceanic boundary layers are critical for earth dynamics because they mediate fluxes of important properties (such as momentum, heat and dissolved gases) between the atmosphere and the ocean. These dynamics are dominated by flow structures that range from millimeters to hundreds of meters and are therefore too small to be accurately resolved by global models and need to be parameterized. We focus on a class of eddy diffusivity models known as K-profile parameterization (KPP) in the oceanic community. This model aims to represent turbulent fluxes by separating them into a diffusive and a nondiffusive component. Many different versions of KPP exist and the greatest disparity between them is the way that surface waves modify these profiles. One of the issues is that oceanographers do not know how the diffusive/nondiffusive separation should change with different wave conditions, which is mainly due to the challenge of estimating both components of the flux separately directly from data.

In order to bridge this gap, we introduce a method that estimates this separation of fluxes for KPP based on data alone (i.e. without needing any a priori assumptions of shape or scaling). We use this method to investigate how the fluxes should be partitioned between diffusive and nondiffusive components across a wide range of oceanic regimes, which can be used to modify KPP in an informed manner and thus reduce the huge disparity between its versions in the community. Our results indicate that it is possible to successfully include wave effects in KPP in a very straightforward manner if the shape of the profiles is modified from the one currently used by models. Furthermore we also show that some modifications are needed in the magnitudes of these profiles to more accurately represent observed fluxes.

Adeyemi Adebiyi	Postdoctoral Scholar	aadebiyi [at] ucla.edu
Fiaz Ahmed	Assistant Project Scientist
Blanca Alvarez	Graduate Student	balvarez [at] atmos.ucla.edu
Xin An	Postdoctoral Scholar	xinan [at] atmos.ucla.edu
Akio Arakawa	Distinguished Research Professor Emeritus	aar [at] atmos.ucla.edu	MSA 7141
Tersi Arias	Graduate Student	tersiarias [at] atmos.ucla.edu
Alex Arnold	Graduate Student
Homayon Aryan	Associate researcher	homayonaryan [at] atmos.ucla.edu
Cody Ashe-McNalley	Systems Administrator / Programmer	cody [at] atmos.ucla.edu	MSA 7101
Roy Bakarn	Assistant Researcher
Marco Sandoval Belmar	Graduate Student	marcsandovalb [at] atmos.ucla.edu
Neil Berg	Assistant Researcher	nberg [at] atmos.ucla.edu
Daniele Bianchi	Assistant Professor	dbianchi [at] atmos.ucla.edu	MSA 7949
Jacob Bortnik	Professor	jbortnik [at] atmos.ucla.edu	MSA 7228
Nathaniel Brockway	Graduate Student	nwbrock [at] atmos.ucla.edu
Zhijiong Cao	Graduate Student	czj9763 [at] g.ucla.edu
Santiago Giraldo Cardenas	Graduate Student	santigiraldoc [at] atmos.ucla.edu
Marcelo Chamecki	Professor	chamecki [at] ucla.edu
Yi Chao	Adjunct Professor	ychao001 [at] gmail.com
Mickael D. Chekroun	Associate researcher	mchekroun [at] atmos.ucla.edu
Bicheng Chen	Postdoctoral Scholar
Gang Chen	Professor	gchenpu [at] atmos.ucla.edu	MSA 7149
Tomas Chor	Graduate Student	tomaschor [at] atmos.ucla.edu
Seth Claudepierre	Associate researcher	sethclaudepierre [at] atmos.ucla.edu
Daniel Clements	Graduate Student	dclements [at] atmos.ucla.edu
Santo Fedele Colosimo	Assistant Researcher	fedele [at] atmos.ucla.edu
Jackson Darke	Graduate Student	jdarke40 [at] atmos.ucla.edu
Daniel Dauhajre	Postdoctoral Scholar
Illian DeCorte	Graduate Student	idecorte [at] atmos.ucla.edu
Xiuyuan Ding	Graduate Student	dingxy [at] atmos.ucla.edu
Daphne Dizon	Academic Personnel Coordinator	djdizon [at] atmos.ucla.edu	MS 7127
Charles Dong	Research Professor	cdong [at] atmos.ucla.edu
Rob Eagle	Assistant Professor	robeagle [at] g.ucla.edu
Annmarie Eldering	Adjunct Assistant Professor	eldering [at] atmos.ucla.edu
Todd Emmenegger	Graduate Student	temmen [at] atmos.ucla.edu
Amir Erfanian	Postdoctoral Scholar
Robert Fovell	Professor Emeritus	fovell [at] atmos.ucla.edu	MSA 7162
Randall Friedl	Adjunct Professor
Rong Fu	Professor / vice Chair	rfu [at] atmos.ucla.edu	MSA 7173
Michael Ghil	Distinguished Research Professor	ghil [at] atmos.ucla.edu	MSA 7236
Geoff Girard	Chief Administrative Officer	girard [at] atmos.ucla.edu	MS 7133
Yu Gu	Adjunct Professor	gu [at] atmos.ucla.edu	GE 2645B
Katrina Hales	Staff Research Associate
Alex Hall	Professor	alexhall [at] atmos.ucla.edu	MSA 7955
Larry Harding	Adjunct Professor	lharding [at] atmos.ucla.edu	SH 5853
Paige Hoel	Graduate Student	paigehoel [at] atmos.ucla.edu
Calvin Howes	Graduate Student	calvinhowes [at] atmos.ucla.edu
Xingying Huang	Postdoctoral Scholar
Yue Huang	Graduate Student	yhuang [at] atmos.ucla.edu
Delphine Hypolite	Postdoctoral Scholar
Arjun Jagannathan	Postdoctoral Scholar
Sarah Johnson	Graduate Student	sjohnson [at] atmos.ucla.edu
Heejeong Kim	Assistant Researcher	heekim [at] atmos.ucla.edu	MS 7115
Jasper Kok	Associate Professor	jfkok [at] ucla.edu	MSA 7142
Dmitri Kondrashov	Researcher	dkondras [at] atmos.ucla.edu	MS 7232
Yi-Hung Kuo	Graduate Student	yhkuo [at] atmos.ucla.edu
Hung-I Lee	Graduate Student	hilee [at] atmos.ucla.edu
Grace Leon	Contract and Grants Manager	gleon [at] atmos.ucla.edu	MS 7127
Danny Leung	Graduate Student	dannymleung [at] g.ucla.edu
Jeffrey Lew	Lecturer	lew [at] atmos.ucla.edu	MSA 1963
Wen Li	Associate researcher	moonli [at] atmos.ucla.edu	MS 7984
Jiawen Li	Graduate Student	jiawen0110 [at] atmos.ucla.edu
Qinbin Li	Professor	qli [at] atmos.ucla.edu	MSA 7220
Jinxing Li	Postdoctoral Scholar	jli [at] atmos.ucla.edu
Marianna Linz	Postdoctoral Scholar	mlinz [at] ucla.edu
Kuo-Nan Liou	Distinguished Professor	knliou [at] atmos.ucla.edu	MSA 7163
Bessie Liu	Graduate Student	bessieliu [at] ucla.edu
Denise Lopez	Student Affairs Officer	dlopez [at] atmos.ucla.edu	MS 7127
Larry Lyons	Distinguished Professor	larry [at] atmos.ucla.edu	MSA 7138
Donglai Ma	Graduate Student	dma96 [at] atmos.ucla.edu
Weiming Ma	Graduate Student	mawei [at] atmos.ucla.edu
Qianli Ma	Assistant Researcher	qianlima [at] atmos.ucla.edu
Gavin Madakumbura	Graduate Student	gavindayanga [at] atmos.ucla.edu
Cristian Martinez-Villalobos	Postdoctoral Scholar	cmartinezvil [at] atmos.ucla.edu
Daniel McCoy	Graduate Student	demccoy [at] atmos.ucla.edu
Matthew McKinney	Graduate Student	mmckinney [at] atmos.ucla.edu
Diana McWilliams	Administrative Specialist	dmcw [at] atmos.ucla.edu	MSA 7983
Jim McWilliams	Louis B. Slichter Professor of Earth Sciences	jcm [at] atmos.ucla.edu	MSA 7983
C. Roberto Mechoso	Distinguished Research Professor Emeritus	mechoso [at] atmos.ucla.edu	MSA 7173
Jonathan Mitchell	Associate Professor	mitch [at] atmos.ucla.edu	GE 4684
Jeroen Molemaker	Associate researcher	nmolem [at] atmos.ucla.edu
Jordyn Moscoso	Graduate Student	jmoscoso [at] atmos.ucla.edu
James Murakami	Staff Meteorologist	tenki [at] atmos.ucla.edu	MS 7101
J. David Neelin	Professor	neelin [at] atmos.ucla.edu	MSA 7969
Yukitoshi Nishimura	Associate researcher	toshi [at] atmos.ucla.edu	MS 7115
Jesse Norris	Project Scientist	jessenorris [at] ucla.edu	MS 7235
Paul Northrop	Assistant Development Engineer
Caitlyn Ongjoco	Admistrative Specialist	congjoco [at] atmos.ucla.edu
Suzanne Paulson	Professor / Chair	paulson [at] atmos.ucla.edu	MSA 7157
Zoe Pierrat	Graduate Student	zpierra [at] atmos.ucla.edu
Olga Pikelnaya	Assistant Researcher	olga [at] atmos.ucla.edu
Victor Pinto	Graduate Student	vpinto [at] ucla.edu
Mingxin Qu	Graduate Student	mingxin23 [at] atmos.ucla.edu
Katharine Reich	Administrative Specialist
Lionel Renault	Assistant Researcher
Rigoberto Resendiz	Contract and Grants Manager	rigoberto.resendiz [at] stat.ucla.edu	MS 8125D
De'Marcus Robinson	Graduate Student	demarcu1.robinson [at] atmos.ucla.edu
Rodrigo Rodakoviski	Graduate Student	rodakoviski [at] atmos.ucla.edu
Pablo Saide	Assistant Professor	saide [at] atmos.ucla.edu	MSA 7234
Ulli Seibt	Associate Professor	ulli [at] atmos.ucla.edu	MSA 7975
Jiaqi Shen	Graduate Student	jqshen [at] ucla.edu
Clara Si	Graduate Student	csi [at] atmos.cula.edu
Logan Simpson	Graduate Student	simpson18 [at] atmos.ucla.edu
Aviv Solodoch	Graduate Student	asolodoch [at] atmos.ucla.edu
Kaushik Srinivasan	Assistant Researcher	kaushiks [at] ucla.edu
Andrew Stewart	Assistant Professor	astewart [at] atmos.ucla.edu	MSA 7162
Jochen Stutz	Professor	jochen [at] atmos.ucla.edu	MSA 7172
Hui Su	Adjunct Professor	Hui.Su [at] jpl.nasa.gov
Wu Sun	Postdoctoral Scholar	wu.sun [at] ucla.edu
Yoshihide Takano	Project Scientist	ytakano [at] atmos.ucla.edu	GE B691
Chad Thackeray	Postdoctoral Scholar
Tina Treude	Professor	ttreude [at] g.ucla.edu	SH 5859
Aradhna Tripati	Affiliated Associate Professor	ripple [at] zephyr.ess.ucla.edu	GE 2659
Katie Tuite	Graduate Student	ktuite [at] atmos.ucla.edu
Richard Turco	Distinguished Professor Emeritus	turco [at] atmos.ucla.edu	MSA 7157
Francis Turney	Graduate Student	fturney [at] ucla.edu
Duane Waliser	Adjunct Professor	duane.waliser [at] jpl.nasa.gov	MSA 7969
Chih-Ping Wang	Researcher	cat [at] atmos.ucla.edu	MS 7115
Peng Wang	Postdoctoral Scholar
Mary Whelan	Postdoctoral Scholar
Sarah Worden	Graduate Student
Yongkang Xue	Affiliated Professor	yxue [at] geog.ucla.edu	Bunche 1255
Chao Yan	Postdoctoral Scholar	yanchao11 [at] tsinghua.org.cn
Huang Yang	Postdoctoral Scholar
Simon Yang	Assistant Project Scientist	yangsi [at] ucla.edu
Xinxin Ye	Postdoctoral Scholar
Kyongwon (Kevin) Yoo	Graduate Student	kyongwonyoo93 [at] atmos.ucla.edu
Chao Yue	Assistant Researcher	yuechao [at] atmos.ucla.edu
Henry Zapata	User Support Specialist	henryz [at] atmos.ucla.edu	MS 7101
Pengfei Zhang	Postdoctoral Scholar	zpengfei [at] atmos.ucla.edu
Wufan Zhang	Graduate Student	zwf [at] g.ucla.edu
Ken Zhao	Graduate Student	kzhao [at] atmos.ucla.edu
Zewen Zheng	Graduate Student	zewenzheng [at] atmos.ucla.edu

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Campus Address	Mailing Address	Contact Information
520 Portola Plaza	UCLA Atmospheric & Oceanic Sciences	Students Services Office: (310) 825-1954
Math Sciences Building 7127	Box 951565	Email: studentinfo@atmos.ucla.edu
Los Angeles, CA 90095	Los Angeles, CA 90095-1565	Phone: (310) 825-1217