- 108
- 78 513
TRR 181 Energy transfers in Atmosphere and Ocean
เข้าร่วมเมื่อ 17 ต.ค. 2016
Investigating the Atmosphere and Ocean is a complex task that needs a combined effort of different scientific fields. Our project brings together oceanographers, meteorologists and mathematicians to tackle the task of improving climate models. For more information visit our website: www.trr-energytransfers.de!
We are funded by the German Research Foundation (DFG).
We are funded by the German Research Foundation (DFG).
TRR Seminar Series: "Scattering of surface waves by ocean currents", by Han Wang
November 28th, 2024
"Scattering of surface waves by ocean currents", by Han Wang (University of Hamburg)
Abstract
Ocean turbulence at meso- and submesocales affects the propagation of surface waves through refraction and scattering, inducing spatial modulations in significant wave height (SWH). We develop a theoretical framework that relates these modulations to the current that induces them. We exploit the asymptotic smallness of the ratio of typical current speed to wave group speed to derive a linear map -- the "U2H map" -- between surface current velocity and SWH anomaly. Analytic expressions of the U2H map show how the SWH responds differently to the vortical and divergent parts of the current, and how the anisotropy of the wave spectrum is key to large current-induced SWH anomalies. In this talk, I will describe the method, its benchmarking against WAVEWATCH III outputs, and its implications for oceanic flows.
"Scattering of surface waves by ocean currents", by Han Wang (University of Hamburg)
Abstract
Ocean turbulence at meso- and submesocales affects the propagation of surface waves through refraction and scattering, inducing spatial modulations in significant wave height (SWH). We develop a theoretical framework that relates these modulations to the current that induces them. We exploit the asymptotic smallness of the ratio of typical current speed to wave group speed to derive a linear map -- the "U2H map" -- between surface current velocity and SWH anomaly. Analytic expressions of the U2H map show how the SWH responds differently to the vortical and divergent parts of the current, and how the anisotropy of the wave spectrum is key to large current-induced SWH anomalies. In this talk, I will describe the method, its benchmarking against WAVEWATCH III outputs, and its implications for oceanic flows.
มุมมอง: 37
วีดีโอ
TRR Seminar Series: "Thoughts on Machine Learning", by Rupert Klein
มุมมอง 79 ชั่วโมงที่ผ่านมา
November 6th, 2024 "Thoughts on Machine Learning", by Rupert Klein (FU Berlin) Abstract Techniques of machine learning (ML) find a rapidly increasing range of applications touching upon social, economic, and technological aspects of everyday life. They are also being used with great enthusiasm to fill in gaps in our scientific knowledge by data-based modelling approaches. I have followed these ...
TRR181 Seminar Series: "Extremely weak meridional heat transports and hemisphe...", by Valerio Lembo
มุมมอง 45หลายเดือนก่อน
October 16th, 2024 "Extremely weak meridional heat transports and hemispheric heatwaves in NH midlatitudes", by Valerio Lembo (CNR-ISAC) Abstract Concurrent heatwaves are gaining more and more attention within the research community, given their widespread socio-economic impact and their increasing frequency related to climate change. Several studies have been devoted to link examples of such s...
TRR 181 Art&Science: Film project "Offshore"© 2024 by designer Radoš Vujaklija
มุมมอง 414 หลายเดือนก่อน
This video was presented in an exhibition at Zollo offspace, in Hammerbrook, Hamburg. The technique the designer Radoš Vujaklija used to organize the content of the video is called “carding” and it is typically used by scriptwriters. To put it simply, pieces of a story and ideas are layed out in cards, to be then reordered in different sequences until an outline of a story emerges that is in th...
TRR181 Seminar: "Effects of improved tidal mixing in NEMO ocean model", by Casimir de Lavergne
มุมมอง 1406 หลายเดือนก่อน
"Effects of improved tidal mixing in NEMO one-degree global ocean model", by Casimir de Lavergne (LOCEAN, Paris, France) Abstract Internal tides power much of the observed small-scale turbulence in the ocean interior. However, few models include a comprehensive and energy-constrained parameterization of mixing by internal tides. Here we present the impacts of three different tidal mixing scheme...
TRR181 Seminar Series: "Response of large-scale Ocean Circulation to Global...", by Heves Pilatin
มุมมอง 956 หลายเดือนก่อน
May 30, 2024 "Response of large-scale Ocean Circulation to Global Internal Wave Parameterization IDEMIX under Last Glacial Maximum Conditions" by Heves Pilatin (University of Bremen) Abstract: As the most recent glacial period of Earth's history, the Last Glacial Maximum (~21,000 years before the present day, LGM) is an important and one of the most studied paleo times when the ice sheet covera...
TRR181 Seminar Series: "A summary of the main results of M7 phase 2", by Dr. Roland Welter
มุมมอง 628 หลายเดือนก่อน
April 11, 2024 "How much resolution is needed for accurate heat transport in turbulent convection? A summary of the main results of M7 phase 2" by Dr. Roland Welter (Universität Hamburg) Abstract: During phase 2, the M7 group has been investigating aspects of turbulence in geophysical flows. A major focus has been on the heat transport induced by turbulent convection, often modeled via paramete...
TRR 181 Art&Science: Theatre play “Die weiße Wand” at Thalia Theater by Director Woody Mues
มุมมอง 4510 หลายเดือนก่อน
This video shows the recording of the theatre play "Die weiße Wand" (engl.: "The white Wall"), which was developed by director Woody Mues together with author Peter Thiers and TRR member Luby Bing aka Bing-ying Lu from the University of Bremen. The performance took place on April 23, 2022, in the 'Nachtasyl' theatre bar at the Thalia Theater in Hamburg. It was an evening of storytelling. About ...
TRR181 Seminar Series: "The effect of wind on overturning wave...", by Prof. Dr. Falk Feddersen
มุมมอง 152ปีที่แล้ว
October 19, 2023 "The effect of wind on overturning wave shape - Field scale observations and modeling" by Prof. Dr. Falk Feddersen (Scripps Institution of Oceanography, UC San Diego) Abstract: The shape of depth-limited breaking-wave overturns is important for turbulence injection, bubble entrainment and sediment suspension. Wave overturns can be large or small relative to wave height and have...
Interview with Prof. Dirk Olbers at Bornö Marine Research Station (Sweden)
มุมมอง 182ปีที่แล้ว
Theoretical Oceanographer Prof. Dirk Olbers (Alfred-Wegener Institut Bremerhaven) talks in this interview about the Bornö Marine Research Station in Sweden and one of his main research topics Internal Waves. For more information have a loot at our website: www.trr-energytransfers.de. This movie is a contribution to the Collaborative Research Centre TRR 181 "Energy Transfer in Atmosphere and Oce...
TRR181 Seminar Series: "Inertia-gravity-wave diffusion by geostrophic turbulence...", by Michael Cox
มุมมอง 141ปีที่แล้ว
September 7, 2023 "Inertia-gravity-wave diffusion by geostrophic turbulence: the role of time dependence and stratification change" by Michael Cox (University of Edinburgh) Abstract: Inertia-gravity waves play a crucial role in ocean mixing. It has become increasingly clear that the distribution of IGW energy in spectral space is controlled by their interactions with the turbulent balanced flow...
TRR181 Seminar Series: "Topographically generated internal waves as a response...", by Ashley Barnes
มุมมอง 145ปีที่แล้ว
July 27, 2023 "Topographically generated internal waves as a response to surface wind forcing" by Ashley Barnes (Australian National University) Abstract: Two of the most significant sources of internal waves in the ocean are surface winds, and oscillatory flow across topography due to the tides. Bridging these two mechanisms, we propose that wind induced oscillations to sea surface and isopycn...
TRR181 Seminar Series: "A deep learning approach to extract internal tides....", by Han Wang
มุมมอง 84ปีที่แล้ว
July 6, 2023 "A deep learning approach to extract internal tides scattered by geostrophic turbulence" by Han Wang (University of Edinburgh) Abstract: Internal tides (ITs) are inertia-gravity waves generated by large-scale oceanic tidal currents flowing over topography, important to oceanographers due to their roles in problems such as deep/upper ocean mixing. Conventionally, for altimetric obse...
TRR181 Seminar Series: "Conditions A comparison of generalized Lorenz models...", by Dr. Sungju Moon
มุมมอง 62ปีที่แล้ว
May 25, 2023 "Conditions A comparison of generalized Lorenz models to the Boussinesq model and investigations into chaotic properties", by Dr. Sungju Moon (Nevada State College) Abstract: The Lorenz ’63 system is a three-dimensional system of ordinary differential equations, originally derived as a minimal model for chaotic and intermittent atmospheric motions by considering the lowest order of...
TRR181 Seminar Series: "Derivation and application of a local diahaline Water...", by Erika Henell
มุมมอง 97ปีที่แล้ว
June 8, 2023 "Derivation and application of a local diahaline Water Mass Transformation framework to the Baltic Sea" by Erika Henell (Leibniz Institute for Baltic Sea Research Warnemünde) Abstract: In this talk I present new insights into the Baltic Sea overturning circulation. An isohaline water mass transformation framework is applied that quantifies and decomposes the diahaline exchange flow...
"Climate science born in HH" Seminar Series, Season 2, Seminar 3 by Robert Sausen
มุมมอง 31ปีที่แล้ว
"Climate science born in HH" Seminar Series, Season 2, Seminar 3 by Robert Sausen
"Climate science born in HH" Seminar Series, Season 2, Seminar 4 by Eduardo Zorita
มุมมอง 38ปีที่แล้ว
"Climate science born in HH" Seminar Series, Season 2, Seminar 4 by Eduardo Zorita
"Climate science born in HH" Seminar Series, Season 2, Seminar 2 by Martin Heimann
มุมมอง 36ปีที่แล้ว
"Climate science born in HH" Seminar Series, Season 2, Seminar 2 by Martin Heimann
"Climate science born in HH" Seminar Series, Season 2, Seminar 1 by Martin Claussen
มุมมอง 64ปีที่แล้ว
"Climate science born in HH" Seminar Series, Season 2, Seminar 1 by Martin Claussen
TRR 181 Art&Science: Symphony "Encoding Seas" by Composer VictorPiano
มุมมอง 52ปีที่แล้ว
TRR 181 Art&Science: Symphony "Encoding Seas" by Composer VictorPiano
Eddy Wave Meeting 2023: Stephanie Waterman
มุมมอง 54ปีที่แล้ว
Eddy Wave Meeting 2023: Stephanie Waterman
Eddy Wave Meeting 2023: Carina Regina de Macedo
มุมมอง 31ปีที่แล้ว
Eddy Wave Meeting 2023: Carina Regina de Macedo
super Video, danke!
Impressive! I understand all the words but ….. good to hear your voice!
amazing！
What is the brand of dispensors used for the DO reagents? Regards retired hydrochemist CSIRO.
Thank you
The only good video about internal waves.
Give me a computer and I'll give you the wrong answer faster, and to more decimal places. Heat does not travel through the gas phase as radiation (see Siddles, Wilson & Simpson, Chemical Physics, 1994) and heat does not move from the condensed matter phase to the gas phase as radiation, see the Pirani gauge. Don't make models, go and learn some physics.
👏👏👏
thank you so much
I love this youitube please upload atmospheric wave
I appreciate your help please upload Equatorial wave
please upload Equatorial wave
Didn't explain how Eddies form at all.
The one piece is real.
Amazing Thank you 🙂❤💚👏👍👍👍👍👍
تصدق أن هذا مذكور قبل ١٤٠٠ عام
Thanks for your videos！！！
So nice!
تصدق أن هذا مذكور قبل ١٤٠٠ عام
Wonderfully done ✅ 🙌🏼 thank you!
sound while the moment of page is very disturbing, by the way, well explained!
This is weird as hell to hear when your name is eddie but thanks for the educational video.
Danke für das Video :)
Interesting!
❤❤❤
I'm still confused.
hahahh，that is what I wana to say
Inappropriate title.
Danke 🙏🏻
Gern geschehen. :)
Klasse. Schön einfach erklärt und nachvollziehbar. Endlich gibt's das mal auf deutsch. Hättet ihr Lust, ein Video über Western intensification zu machen?
Great :)) Love it!
Thank you!
Beautifully done. Simple, clean and to the point.
Thank you! That was only possible because of our great colleagues from Explainity!