Clouds and PrecipitationSelected topics and how HALO can helpSelected topics, and how HALO can help.

– Some Appetizers –

M W di h U i L i iM. Wendisch, Uni Leipzig

F Ament (Uni Hamburg) U Corsmeier (KIT)F. Ament (Uni Hamburg), U. Corsmeier (KIT), S. Crewell (Uni Köln), M. Kaufmann (FZJ),A Petzold (DLR) U Schumann (DLR)A. Petzold (DLR), U. Schumann (DLR) 

DFG Priority Programme 1294, HALOEvaluation Colloquium, Oberpfaffenhofen, 11–12 March 2010

Cirrus, Deep & Shallow Convective Clouds

F ti f E B d t &Life Cycle

Formation ofPrecipitation

Energy Budget & Remote Sensing

Mi f I di t Eff t‐ Microstructure ofConvective Clouds

‐ Cirrus and Warm C B lt

‐ Vertical Distribution of Hydrometeors

‐ Mesoscale Heavy 

‐ Indirect Effects

‐ MicrophysicalProperties

Conveyer Belts  Rain Forecast ‐ Subvisible Cirrus

Selected Topics

Source: http://www.youtube.com/

Questions: - How do vertical profiles of microphysical p yproperties evolve?

- Is the aerosol particlebackground important?

Life Cycle – Microstructure  of Convective Clouds (ACRIDICON, NEPTUN, NARVAL)

background important?

WCB Warm Conveyer BeltsHP High Pressure System

Question:How do microphysical and radiative properties of WCBradiative properties of WCB and HP cirrus depend on formation conditions:

Updraft velocity- Updraft velocity, - Humidity, and - Inflowing aerosol?

Life Cycle – Cirrus and Warm Conveyer Belts (ML‐CIRRUS, CIRRUS‐RS)

Cirrus, Deep & Shallow Convective Clouds

F ti f E B d t &Life Cycle

Formation ofPrecipitation

Energy Budget & Remote Sensing

I di t Eff t‐ Microstructure ofConvective Clouds

‐ Cirrus and Warm 

‐ Shallow ConvectiveCloud Systems

‐ Mediterranean

‐ Indirect Effects

‐ MicrophysicalProperties

Conveyer Belts Cyclogenesis ‐ Subvisible Cirrus

Selected Topics

Question: To what extent are shallow cloud systems (fair-weather, trade wind area, or post-frontal of extra-tropical cyclones) precipitating?

HALO Microwave Package (HAMP) = Microwave Radiometer + Cloud Radar

Formation of Precipitation – Shallow  Convective Cloud Systems  (NARVAL)

Question: Can we improve the prediction of rainfall caused by pre-frontal rain bands and convective cells triggered by e.g. orography?

Formation of Precipitation – Mediterranean  Cyclogenesis (NEPTUN)

Cirrus, Deep & Shallow Convective Clouds

Lif C lFormation of Energy Budget & 

Life Cycle Precipitationgy g

Remote Sensing

‐ Microstructure of ‐ Shallow Convective ‐ AnthropogenicMicrostructure ofConvective Clouds

‐ Cirrus and Warm Conveyer Belts

Shallow ConvectiveCloud Systems

‐ MediterraneanCyclogenisis

Effects

‐ Microphysical Proper‐ties & RadiationConveyer Belts Cyclogenisis

‐ Sub‐Visible Cirrus

Selected Topics

Question: Can a measurable diurnal cycle of aviation-induced cloudiness near the North Atlantic Flight Corridor (NAFC) be verified?

NAFC

G d

Shanon

Gander

Energy Budget  & Remote Sensing – Anthropogenic Effects (ML‐CIRRUS)

Question: Is there any threshold optical thickness above which the ice crystal shape looses significance in determining the

radiative forcing of cirrus clouds?radiative forcing of cirrus clouds?

Liou et al. [2000]

Energy Budget & Remote Sensing – Microphysical Properties & Radiation (ML‐CIRRUS, CIRRUS‐RS)

Cirrus, Deep & Shallow Convective Clouds

Formation of Energy Budget &Life Cycle

Formation ofPrecipitation

Energy Budget & Remote Sensing

ACRIDICONACRIDICON

CIRRUS‐RS

ML‐CIRRUS

ACRIDICON

NARVAL

ACRI ICON

CIRRUS‐RS

ML‐CIRRUSNARVAL

NEPTUN

NEPTUNML CIRRUS

NARVAL

How HALO can help – Planned missions

Cirrus, Deep & Shallow Convective Clouds

Formation of Energy Budget &Life Cycle

Formation ofPrecipitation

Energy Budget & Remote Sensing

1, 2, 5, 16, 29, 30, 33, 34, 37, 39 42 52

1, 2, 25, 29, 33, 34, 42, 

52

1, 2, 4, 5, 16, 28, 29, 36, 42, 

44 5339, 42, 52  52 44, 53

How HALO can help – Proposals submitted

Th k f tt tiThanks for your attention.

ACRIDICON Aerosol, Cloud, Precipitation, and Radiation Interactions and Dynamics of Convective Cloud Systems

CIRRUS-RS Cirrus – Remote Sensing ML-CIRRUS Mid-Latitude Cirrus: Formation, Lifetime, Properties and

R di ti I t f Mid L tit d Ci Cl dRadiative Impact of Mid-Latitude Cirrus CloudsNARVAL Next-generation Aircraft Remote-Sensing for Validation

Studies NEPTUN Deep convection and cyclones causing High ImpactNEPTUN Deep convection and cyclones causing High Impact

Weather (HIW) in the Mediterranean

Acronyms