Organization of tropical convection in low vertical wind shears: Role of updraft entrainment - Université Pierre et Marie Curie Accéder directement au contenu
Article Dans Une Revue Journal of Advances in Modeling Earth Systems Année : 2017

Organization of tropical convection in low vertical wind shears: Role of updraft entrainment

Résumé

Radiative-convective equilibrium simulations with a 2 km horizontal resolution are conducted to investigate the impact on convective organization of different parameterizations for horizontal and vertical subgrid turbulence mixing. Three standard approaches for representing horizontal diffusion produce starkly differing mixing rates, particularly for the entrainment mixing into updrafts, which differ by more than an order of magnitude between the schemes. The simulations demonstrate that the horizontal subgrid mixing of water vapor is key, with high mixing rates a necessary condition for organization of convection to occur, since entrainment of dry air into updrafts suppresses convection. It is argued that diabatic budgets, while demonstrating the role of spatially heterogeneous radiative heating rates in driving organization, can overlook the role of physical processes such as updraft entrainment. These results may partially explain previous studies that showed that organization is more likely to occur at coarser resolutions, when entrainment is solely represented by subgrid-scale turbulence schemes, highlighting the need for benchmark simulations of higher horizontal resolution. The recommendation is for the use of larger ensembles to ensure robustness of conclusions to subgrid-scale parameterization assumptions when numerically investigating convective organization, possibly through a coordinated community model intercomparison effort.Plain Language SummaryThunderstorms dry out the atmosphere since they produce rainfall. However, their efficiency at drying the atmosphere depends on how they are arranged; take a set of thunderstorms and sprinkle them randomly over the tropics and the troposphere will remain quite moist, but take that same number of thunderstorms and place them all close together in a "cluster" and the atmosphere will be much drier. Previous work has indicated that thunderstorms might start to cluster more as temperatures increase, thus drying the atmosphere and letting more infrared radiation escape to space as a result - acting as a strong negative feedback on climate, the so-called iris effect. We investigate the clustering mechanisms using 2km grid resolution simulations, which show that strong turbulent mixing of air between thunderstorms and their surrounding is crucial for organization to occur. However, with grid cells of 2 km this mixing is not modelled explicitly but instead represented by simple model approximations, which are hugely uncertain. We show three commonly used schemes differ by over an order of magnitude. Thus we recommend that further investigation into the climate iris feedback be conducted in a coordinated community model intercomparison effort to allow model uncertainty to be robustly accounted for. </div> </div> <div class="col-lg-5"> <div class="keywords"> <div> <h4> Mots clés </h4> <div class="btn-group" role="group" aria-label="Choix langues" style="align-items: unset;"> <button class="btn btn-lang-keywords active" aria-pressed="true" data-lang="en"> en </button> </div> <div class="keys-lang en active" data-lang="en"> <a class="hal-bgtext" href="/UPMC/search/index/q/*/keyword_t/climate%20feedback" target="_blank" rel="nofollow">climate feedback</a> <a class="hal-bgtext" href="/UPMC/search/index/q/*/keyword_t/self-aggregation" target="_blank" rel="nofollow">self-aggregation</a> <a class="hal-bgtext" href="/UPMC/search/index/q/*/keyword_t/subgrid%20turbulence%20mixing" target="_blank" rel="nofollow">subgrid turbulence mixing</a> <a class="hal-bgtext" href="/UPMC/search/index/q/*/keyword_t/water%20vapor" target="_blank" rel="nofollow">water vapor</a> <a class="hal-bgtext" href="/UPMC/search/index/q/*/keyword_t/clustering" target="_blank" rel="nofollow">clustering</a> </div> </div> </div> <div class="domains"> <h4> Domaines </h4> <a class="hal-bgtext" href="/search/index/q/*/level0_domain_s/sdu" rel="nofollow" target="_blank">Planète et Univers [physics]</a> </div> <button data-toggle="modal" data-docid="3754594" data-target="#metadatas_Modal" aria-expanded="false" aria-controls="metadatas_Modal" class="btn hal-option-button metadatas" style="margin-top: 48px; width: 100%;"> Liste complète des métadonnées </button> <div class="modal fade" id="metadatas_Modal" data-backdrop=true tabindex="-1" aria-labelledby="metadatas_ModalLabel" aria-hidden="true" role="dialog"> <div class="modal-dialog" role="document"> <div class="modal-content"> <div class="modal-body" id="metadata-body" style="padding: 0;"></div> </div> </div> </div> </div> </div> <div class="viewer panel-doc d-none d-sm-block"> <button data-toggle="collapse" data-docid="3754594" data-target="#viewer-detailed" aria-expanded="true" aria-controls="viewer-detailed" class="btn drop-down"> Fichiers et aperçu <span class="icon-drop_down hal-icon" aria-hidden="true"></span> </button> <div id="viewer-detailed" class="panel-doc-detailed collapse show"> <div class="row"> <div class="col-md-2"> <div id="list-thumbnail-viewer" style="text-align: center;"> <span class='file-major'>Fichier principal</span> <div class="thumbnail-viewer active" data-id="3281672" data-preview="https://insu.hal.science/insu-03727064v1/preview/J%20Adv%20Model%20Earth%20Syst%20-%202017%20-%20Tompkins%20-%20Organization%20of%20tropical%20convection%20in%20low%20vertical%20wind%20shears%20Role%20of%20updraft.pdf"> <img alt="Vignette du fichier" src="//thumb.ccsd.cnrs.fr/9069924/medium" style="width: 100%;"> </div> <span> J Adv Model Earth Syst - 2017 - Tompkins - Organization of tropical convection in low vertical wind shears Role of updraft.pdf (4.75 Mo) </span> <a href="https://insu.hal.science/insu-03727064v1/file/J%20Adv%20Model%20Earth%20Syst%20-%202017%20-%20Tompkins%20-%20Organization%20of%20tropical%20convection%20in%20low%20vertical%20wind%20shears%20Role%20of%20updraft.pdf" download="J Adv Model Earth Syst - 2017 - Tompkins - Organization of tropical convection in low vertical wind shears Role of updraft.pdf"><span class="icon-download" aria-hidden="true"></span><span class="sr-only">Télécharger le fichier</span> </a> </div> </div> <div class="col-md-9 pb-4"> <div class="viewer-content active" id="3281672"> <iframe src="https://insu.hal.science/insu-03727064v1/preview/J%20Adv%20Model%20Earth%20Syst%20-%202017%20-%20Tompkins%20-%20Organization%20of%20tropical%20convection%20in%20low%20vertical%20wind%20shears%20Role%20of%20updraft.pdf#page=2" allowfullscreen webkitallowfullscreen></iframe> <span>Origine : Fichiers éditeurs autorisés sur une archive ouverte </span><br/> </div> </div> </div> </div> </div> </div> <div class="submitted-date d-none d-sm-block"> <p> <a rel="nofollow" href="/UPMC/search/index/q/*/contributorId_i/106505" target="_blank">Nathalie POTHIER</a>  : <a href='javascript:void(0);' onclick="$('#form-login').submit();">Connectez-vous pour contacter le contributeur</a> </p> <p>https://insu.hal.science/insu-03727064</p> <p>Soumis le : vendredi 19 août 2022-16:23:25</p> <p>Dernière modification le : lundi 1 mai 2023-04:01:35</p> <p>Archivage à long terme le : dimanche 20 novembre 2022-18:30:08</p> </div> </section> <section class="col-12 col-md-3 order-sm-1"> <div class="section-content section-shadow hal-visualize-button widget-files"> <a href="https://insu.hal.science/insu-03727064v1/document" target="_blank"> <div class="file d-flex align-items-center justify-content-center"> <i class="icon-download hal-icon mr-4" aria-hidden="true"></i> <span>Télécharger pour visualiser</span> </div> </a> </div> <div class="section-content section-shadow"> <h3> Dates et versions</h3> <div class="bg-beige versions pt-1 pb-1"> <span>insu-03727064 ,</span> <span><a href="/UPMC/insu-03727064v1"> version 1</a></span> <span>(19-08-2022)</span> </div> <h3> Licence</h3> <div> <img src="/assets/img/licences/cc.png" alt="" width="20px" height="20px" /> <img src="/assets/img/licences/by.png" alt="" width="20px" height="20px" /> <img src="/assets/img/licences/nc.png" alt="" width="20px" height="20px" /> <img src="/assets/img/licences/sa.png" alt="" width="20px" height="20px" /> <a href="http://creativecommons.org/licenses/by-nc-sa/4.0/" target="_blank" rel="noopener"> Paternité - Pas d'utilisation commerciale - Partage selon les Conditions Initiales</a> </div> <h3 style="margin-top: 10px;"> Identifiants</h3> <div class="identifier-list"> <ul> <li> <span> HAL Id : </span> <span> insu-03727064 , version 1 </span> </li> <li> <span> BIBCODE : </span> <span> <a href="http://adsabs.harvard.edu/cgi-bin/nph-bib_query?bibcode=2017JAMES...9.1046T" target="_blank"> 2017JAMES...9.1046T </a> </span> </li> <li> <span> DOI : </span> <span> <a href="https://dx.doi.org/10.1002/2016MS000802" target="_blank"> 10.1002/2016MS000802 </a> </span> </li> </ul> </div> </div> <div class="section-content section-shadow"> <div style="display: flex; justify-content: space-between; align-items: center;"> <h3> Citer</h3> <button id="citation-button" class="hal-option-button" style="padding: 6px 12px;"><span class="icon-copy"></span></button> </div> <div class="bg-beige p-2" id="citation"> Adrian M. Tompkins, Addisu G. Semie. Organization of tropical convection in low vertical wind shears: Role of updraft entrainment. <i>Journal of Advances in Modeling Earth Systems</i>, 2017, 9, pp.1046-1068. <a target="_blank" href="https://dx.doi.org/10.1002/2016MS000802">⟨10.1002/2016MS000802⟩</a>. <a target="_blank" href="https://insu.hal.science/insu-03727064">⟨insu-03727064⟩</a> </div> </div> <div class="section-content section-shadow section-export"> <h3> Exporter</h3> <a class="hal-bgtext size-regular" href="/insu-03727064v1/bibtex" target="_blank" style="white-space: nowrap;">BibTeX</a> <a class="hal-bgtext size-regular" href="/insu-03727064v1/tei" target="_blank" style="white-space: nowrap;">XML-TEI</a> <a class="hal-bgtext size-regular" href="/insu-03727064v1/dc" target="_blank" style="white-space: nowrap;">Dublin Core</a> <a class="hal-bgtext size-regular" href="/insu-03727064v1/dcterms" target="_blank" style="white-space: nowrap;">DC Terms</a> <a class="hal-bgtext size-regular" href="/insu-03727064v1/endnote" target="_blank" style="white-space: nowrap;">EndNote</a> <a class="hal-bgtext size-regular" href="/insu-03727064v1/datacite" target="_blank" style="white-space: nowrap;">DataCite</a> </div> <div class="section-content section-shadow section-collection"> <h3> Collections</h3> <div> <a class="hal-bgtext size-regular" href="/INSU" target="_blank"> INSU</a> <a class="hal-bgtext size-regular" href="/X" target="_blank"> X</a> <a class="hal-bgtext size-regular" href="/ENS-PARIS" target="_blank"> ENS-PARIS</a> <a class="hal-bgtext size-regular" href="/ENPC" target="_blank"> ENPC</a> <a class="hal-bgtext size-regular" href="/UPMC" target="_blank"> UPMC</a> <a class="hal-bgtext size-regular" href="/CNRS" target="_blank"> CNRS</a> <a class="hal-bgtext size-regular" href="/X-LMD" target="_blank"> X-LMD</a> <a class="hal-bgtext size-regular" href="/X-DEP-MECA" target="_blank"> X-DEP-MECA</a> <a class="hal-bgtext size-regular" href="/PARISTECH" target="_blank"> PARISTECH</a> <a class="hal-bgtext size-regular" href="/LMD" target="_blank"> LMD</a> <a class="hal-bgtext size-regular" href="/ENPC-LMD" target="_blank"> ENPC-LMD</a> <a class="hal-bgtext size-regular" href="/PSL" target="_blank"> PSL</a> <a class="hal-bgtext size-regular" href="/UNIV-PARIS-SACLAY" target="_blank"> UNIV-PARIS-SACLAY</a> <a class="hal-bgtext size-regular" href="/SORBONNE-UNIVERSITE" target="_blank"> SORBONNE-UNIVERSITE</a> <a class="hal-bgtext size-regular" href="/SU-SCIENCES" target="_blank"> SU-SCIENCES</a> </div> </div> <div class="section-content section-shadow" id="metrics"> <div class="row"> <div class="metrics-views col-6"> <span> 88 </span> <span>Consultations</span> </div> <div class="metrics-views col-6"> <span> 10 </span> <span>Téléchargements</span> </div> </div> </div> <div class="section-content section-shadow section-collection"> <h3> Altmetric</h3> <script src="https://d1bxh8uas1mnw7.cloudfront.net/assets/embed.js"></script> <div data-badge-details="right" data-badge-type="donut" data-hide-no-mentions="false" class="altmetric-embed" data-doi="10.1002/2016MS000802" ></div> </div> <div class="section-content section-shadow"> <h3> Partager</h3> <!-- AddToAny BEGIN --> <div class="a2a_kit a2a_kit_size_32 a2a_default_style"> <a class="a2a_button_google_gmail"></a><span class="sr-only"> Gmail </span> <a class="a2a_button_facebook"></a><span class="sr-only"> Facebook </span> <a class="a2a_button_x"></a><span class="sr-only"> X </span> <a class="a2a_button_linkedin"></a><span class="sr-only"> LinkedIn </span> <a class="a2a_dd" href="https://www.addtoany.com/share"></a><span class="sr-only"> More </span> </div> <script async src="https://static.addtoany.com/menu/page.js"></script> <!-- AddToAny END --> </div> </section> </section> <script type="text/javascript"> $(function () { linkifyElem ('.linkify'); }); </script> </main> <footer> <div class="row" style="margin:0"> <div class="col-sm-4 col-md-2"> <p> Contact </p> <ul> <li> <a href="//doc.archives-ouvertes.fr/support" target="_blank" rel="noopener">Support</a> </li> </ul> </div> <div class="col-sm-4 col-md-2"> <p> Ressources</p> <ul> <li> <a href="//doc.archives-ouvertes.fr/" target="_blank" > Documentation </a> </li> <li> <a href="//doc.archives-ouvertes.fr/faq" target="_blank" > FAQ </a> </li> <li> <a href="https://api.archives-ouvertes.fr/docs" target="_blank" > API </a> </li> <li> <a href="https://api.archives-ouvertes.fr/docs/oai" target="_blank" > OAI-PMH </a> </li> <li> <a href="https://aurehal.archives-ouvertes.fr" target="_blank" > AuréHAL </a> </li> </ul> </div> <div class="col-sm-4 col-md-2"> <p> Informations</p> <ul> <li> <a href="https://about.hal.science/privacy-policy" target="_blank"> Données personnelles </a> </li> <li> <a href="https://about.hal.science/legal-notice/" target="_blank"> Mentions légales </a> </li> <li> <a href="https://about.hal.science/web-accessibility/" target="_blank"> Accessibilité </a> </li> <li> <a href="https://about.hal.science/RGAA-compliance/" target="_blank"> Conformité RGAA </a> </li> </ul> </div> <div class="col-sm-4 col-md-2"> <p> Questions juridiques </p> <ul> <li> <a href="https://www.ouvrirlascience.fr/je-publie-quels-sont-mes-droits/" target="_blank" > Je publie, quels sont mes droits ? </a> </li> <li> <a href="https://www.ouvrirlascience.fr/guide-application-loi-republique-numerique-article-30-ecrits-scientifiques-version-courte/" target="_blank" > Loi pour une République numérique </a> </li> <li> <a href="https://www.ouvrirlascience.fr/mettre-en-oeuvre-la-strategie-de-non-cession-des-droits-sur-les-publications-scientifiques/" target="_blank" > Stratégie de non-cession des droits </a> </li> <li> <a href="https://v2.sherpa.ac.uk/romeo/" target="_blank" > SHERPA/RoMEO </a> </li> </ul> </div> <div class="col-sm-4 col-md-2"> <p> Portails </p> <ul> <li><a href="https://hal.science/browse/portal" target="_blank"> Portails institutionnels </a></li> <li><a href="https://hal.science" target="_blank" >HAL</a></li> <li><a href="//shs.hal.science" target="_blank" >HAL SHS</a></li> <li><a href="//theses.hal.science" target="_blank" >HAL Thèses</a></li> <li><a href="//media.hal.science" target="_blank" >MédiHAL</a></li> </ul> </div> <div class="col-sm-4 col-md-2"> <p> CCSD </p> <ul> <li> <a href="//www.ccsd.cnrs.fr/" target="_blank" > CCSD </a> </li> <li> <a href="//www.episciences.org/" target="_blank" > Episciences </a> </li> <li> <a href="//www.sciencesconf.org/" target="_blank" > Sciencesconf </a> </li> </ul> </div> </div> </footer> </body> </html>