H2020Индивидуална стипендия2019–2022

STEP · Solving The Entrainment Puzzle

„Хоризонт 2020“ — Действия „Мария Склодовска-Кюри“

Период: 2019-05-01 → 2022-07-22
Финансиране от ЕС: 174 806 €
Участници: 1
Схема: MSCA-IF

Линиите свързват координатора с партньорите.

Накратко на български

Процесът на смесване между облачния и чистия въздух по краищата на облаците се анализира чрез лабораторни измервания и симулации. По-доброто разбиране на този механизъм помага за намаляване на грешките в климатичните модели и по-точни прогнози за промените в климата.

Този кратък обзор е генериран от изкуствен интелект

Кратко обяснение, генерирано от езиков модел по текста на CORDIS. Оригиналът е по-долу.

Резултати накратко

Solving The Entrainment Puzzle

This Marie Skłodowska Curie Action (MSCA) is named "Solving The Entrainment Puzzle" (STEP) and is aimed exactly at doing that. The problem: As a cloud moves through environmental air, cloudy and cloud free air mix at the cloud edges in the entrainment process. Entrainment is a key cloud process central to understanding cloud morphology and microphysical processes such as precipitation formation. Entrainment changes cloud particle properties such as number concentrations and sizes, which also modifies the radiative properties of the cloud, and is responsible for the depletion of cloud water content, along with precipitation. It has thus important implications for cloud lifetime. After decades of research, no reliable formulation exists that allows to describe and understand entrainment in terms of cloud- and environmental physical quantities ("the entrainment puzzle"). Differences in representation of entrainment in climate models are a main cause for spread in climate sensitivity estimates. The realistic treatment of entrainment in climate models will help to reduce a large part of the uncertainty in predictions of climate sensitivity. This will in turn help to inform climate adaptation and mitigation strategies. STEP is thus addressing one of the Europe 2020 strategy main targets "Climate Change and Energy" Objectives of this project have been to 1) identify the main underlying physical parameters governing entrainment using laboratory measurements in a unique turbulent wind tunnel (the Turbulent Leipzig Aerosol and Cloud Interaction Simulator, short LACIS-T) and understand in what way these parameters influence entrainment; 2) use Computational Fluid Dynamics (CFD) simulations that accompany the laboratory measurements in order to close the scale gap between the mm-scale (CFD) and 10 m-scale, where Large Eddy Simulations (LES, which can be embedded in weather forecast models) can perform. This will be used to formulate a new entrainment calculation scheme; 3) to verify the new entrainment calculation using comparison of in situ cloud observations and LES case studies of those cloud cases; 4) to foster the development of the individual researcher - which is me.

Текст от CORDIS, на английски · Данни: CORDIS, © Европейски съюз

Цел на проекта

As a cloud moves through environmental air, cloudy and cloud free air mix at the cloud edges in the entrainment process. Entrainment is a key cloud process central to understanding cloud morphology and microphysical processes such as precipitation formation. After decades of research, no reliable formulation exists that allows to describe and understand entrainment in terms of cloud- and environmental physical quantities (""the entrainment puzzle""). Differences in representation of entrainment in climate models are a main cause for spread in climate sensitivity estimates. The realistic treatment of entrainment in climate models will help to reduce a large part of the uncertainty in predictions of climate sensitivity.This project aims at Solving The Entrainment Puzzle (STEP):- By identification of the main physical parameters that govern the amount of air entrained into and detrained from clouds using controlled laboratory measurements.- By translating the experimental results into a new mathematical formulation to use in Large Eddy Simulations of clouds using computational fluid dynamics modelling.In a unique approach, STEP will combine observations from a novel turbulent cloud chamber, computational fluid dynamics, and Large Eddy Simulations to develop a new reliable entrainment calculation scheme. Solving the entrainment puzzle will allow quantifying the entrainment processes reliably and thus deliver the basis for climate model improvements.The STEP project builds on my expertise in cloud microphysics and dynamics gained at various international institutes and will be accomplished at a leading international research institution. The host will provide me with excellent complementary training and career development opportunities. Through various dissemination and communication activities, STEP will contribute to the visibility and excellence of the European Science Area, addressing one of the Europe 2020 strategy main targets ""Climate Change and Energy"".""

Оригинален текст от CORDIS (на английски).

Участници

LEIBNIZ INSTITUT FUER TROPOSPHAERENFORSCHUNG e.V. · LeipzigКоординаторГермания