UTLS CIRRUS: Anthropogenic influence on UTLS clouds and aerosol

Anthropogenic influence on Upper Tropospher-Lower Stratosphere (UTLS) clouds and aerosol (CIRRUS) UTLS round 5 project led by Prof. Tom Choularton. The dataset contains the total number of Condensation Nuclei (CN), CCN, IN and the size distribution of optically active particles in clean and polluted air in the UTLS region over the UK, the number, size distribution, phase and morphology of droplets and crystals in cirrus cloud.

Objectives

-To measure the total number of Condensation Nuclei (CN), CCN, IN and the size distribution of optically active particles in clean and polluted air in the UTLS region over the UK. Assessment of their spatial distribution and their likely source based on tracer measurements and air mass history.

-To use a unique suite of state of the art instruments to quantify the extent to which air mass history, and gas and particle loading can affect the microphysical properties of cirrus clouds in the UTLS region, in particular, the size distribution, phase and morphology of cloud particles.

-To obtain estimates of HNO3 loss to cirrus clouds and the subsequent effect on the aerosol population after the cloud has evaporated using case studies involving one or more wave clouds.

-To make observations of the number, size distribution, phase and morphology of droplets and crystals in cirrus cloud and the number and size distribution of interstitial particles and correlate these with measurements of tracers that identify anthropogenic anthropogenic influence. Hence building on objective 3 to investigate the influence of cirrus on the distribution of aerosol and gases in the UTLS region as cloud and precipitation evaporate.

-To make an assessment of the chemical composition of the particulate in the UTLS region as a function of their size, their spatial variability and the effect different sources have on their composition.

-To use measurements of the masses of key components as a function of size of cirrus particle dry residues and interstitial particles to determine if there are distinct chemical differences between activated and unactivated particles.

-To establish the partitioning of oxidised nitrogen between the gas and aerosol phases as a function of air mass history and source region.

Methodology

These studies were performed during the spring/summer of 2005 over the UK using the BAE 146 aircraft for in situ sampling Experiments were undertaken in a wide range of meteorological conditions i.e. in frontal cirrus, in convective conditions and in anticyclonic conditions. The aircraft made measurements below and within the cirrus cloud.

Date (Publication): 2005-12-10T02:35:33

Date (Creation): 2005-12-10T02:35:33

Citation identifier: https://catalogue.ceda.ac.uk/uuid/34f4bbb2f9a5d80216862f9778aba609

Citation identifier: NCAS British Atmospheric Data Centre (NCAS BADC) / 34f4bbb2f9a5d80216862f9778aba609

Point of contact

Organisation name	Individual name	Electronic mail address	Role
Natural Environment Research Council (NERC)		unknown	Author
Unavailable	Choularton, Tom W.	Unavailable	Author
Unavailable	et. al,	Unavailable	Author
NCAS British Atmospheric Data Centre (NCAS BADC)		badc@rl.ac.uk	Custodian
NCAS British Atmospheric Data Centre (NCAS BADC)		badc@rl.ac.uk	Distributor
NCAS British Atmospheric Data Centre (NCAS BADC)		badc@rl.ac.uk	pointofContact
NCAS British Atmospheric Data Centre (NCAS BADC)		badc@rl.ac.uk	Publisher

Maintenance and update frequency: Unknown

Update scope: Series

Keywords

UTLS
FAAM
CIRRUS
aerosol
clouds

GEMET - INSPIRE themes, version 1.0

atmospheric conditions

Access constraints: Other restrictions

Other constraints: All data within this dataset collection are available to any registered CEDA user.

Use constraints: Other restrictions

Other constraints: Under the following licence http://www.nationalarchives.gov.uk/doc/open-government-licence/version/3/, appropriate use of these data may fall under any use. This message is intended as guidance, always read the full licence. When using these data you must cite them correctly using the citation given on the CEDA Data Catalogue record.

Spatial representation type: Grid

Language: English

Topic category

Climatology, meteorology, atmosphere

Begin date: 2005-03-29T23:00:00

End date: 2005-08-17T15:13:22

Unique resource identifier: WGS 84

Distribution format

Name	Version
Contact data centre for format details.

Distributor contact

Organisation name	Individual name	Electronic mail address	Role
NCAS British Atmospheric Data Centre (NCAS BADC)		badc@rl.ac.uk	Distributor

OnLine resource

Protocol	Linkage	Name
	https://catalogue.ceda.ac.uk/uuid/34f4bbb2f9a5d80216862f9778aba609	CEDA Data Catalogue Page

OnLine resource

Protocol	Linkage	Name
	http://faam.nerc.ac.uk/	FAAM NERC website

OnLine resource

Protocol	Linkage	Name
	https://artefacts.ceda.ac.uk/badc_datadocs/utls-ozone/utls-protocol.html	UTLS-Ozone Data Protocol

Hierarchy level: Series

Conformance result

Title: Commission Regulation (EU) No 1089/2010 of 23 November 2010 implementing Directive 2007/2/EC of the European Parliament and of the Council as regards interoperability of spatial data sets and services

Date (Publication): 2010-12-08

Statement: Please see data lineage statements for each dataset within this collection for data lineage details.

Metadata

File identifier: 34f4bbb2f9a5d80216862f9778aba609 XML

Metadata language: English

Character set: UTF8

Hierarchy level: Series

Hierarchy level name: series

Date stamp: 2025-12-04T03:26:40

Metadata standard name: UK GEMINI

Metadata standard version: 2.3

Metadata author

Organisation name	Individual name	Electronic mail address	Role
NCAS British Atmospheric Data Centre (NCAS BADC)		badc@rl.ac.uk	Point of contact

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