Scientific Advisory Group for Total Atmospheric Deposition
The focus of the SAG TAD (formerly named SAG on Precipitation Chemistry) was recently expanded to include dry and total deposition to reflect current scientific knowledge that total (wet plus dry) atmospheric deposition characterizes the exchange process between the atmosphere and the underlying surface, while precipitation chemistry and wet deposition capture only part of this exchange. The goal of the SAG TAD is to provide a more comprehensive understanding and quantification of total atmospheric deposition, which is of critical importance for satisfying the needs of the GAW Programme and for understanding contemporary and emerging environmental issues.
Members
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Terms of Reference
Core activities
● Facilitate research related to the total atmospheric deposition working closely with the relevant international programmes and projects, as well as joint activities with other major environmental science activities including ambient aerosol and gas monitoring, atmospheric modelling, ecosystem effects research, climate research, etc.;
● Coordinate the work related to quantification of the patterns and trends of the composition of precipitation and total deposition on global and regional scales and produce regular assessments;
● Provide guidance on the development of the methods for the estimation of the total atmospheric deposition with a specific focus on dry deposition and feed those scientific developments to MMF-GTAD initiative;
● Improve understanding of atmospheric deposition of chemical species of existing or emerging interest (e.g. organic acids, black carbon, metals, phosphorus, mercury, nitrogen);
● Promote the establishment of the new sites, field laboratory and data management operations;
● Assist/supervise the development of the relevant training materials and training delivery and support capacity development activities.
Interface with SAGs
● Work closely with the other thematic SAGs on the improved understanding of the element cycles, exchange processes and chemical transformations.
Interface with Expert Teams
● Work closely with ET-ACMQ on the assessment of the new measurement methodologies, quality assurance and control tools and the revision of existing measurement guidance;
● Work closely with ET-ACMQ on the establishment of good practice guidelines and common procedures for quality assurance;
● Work with the ET- ACDM on the data archival and availability in the WMO World Data Centers and the needs for additional variable and related metadata;
● Work closely with ET- ACNDE on the provision of the user requirement for the deposition related applications.
Interface with GAW initiatives steering committees
● Advise MMF-GTAD Steering committee on the research related to measurement-model fusion methodologies to obtain total deposition estimates.
Interface with WMO groups
● Collaborate with the WMO and co-sponsored programmes on the aspects of deposition within the Earth System approach by addressing weather (precipitation), hydrological, agriculture and ocean research .
Interface with external users and partners
● Outreach to other scientific and non-scientific communities regarding the state of science related to atmospheric deposition of major ions and other chemicals, including the work of the MMF-GTAD initiative, as well as proper understanding and use of measurement data;
● Communicate the availability of GAW observations to user communities, including ecosystem effects and atmospheric modelling communities.
● Facilitate research related to the total atmospheric deposition working closely with the relevant international programmes and projects, as well as joint activities with other major environmental science activities including ambient aerosol and gas monitoring, atmospheric modelling, ecosystem effects research, climate research, etc.;
● Coordinate the work related to quantification of the patterns and trends of the composition of precipitation and total deposition on global and regional scales and produce regular assessments;
● Provide guidance on the development of the methods for the estimation of the total atmospheric deposition with a specific focus on dry deposition and feed those scientific developments to MMF-GTAD initiative;
● Improve understanding of atmospheric deposition of chemical species of existing or emerging interest (e.g. organic acids, black carbon, metals, phosphorus, mercury, nitrogen);
● Promote the establishment of the new sites, field laboratory and data management operations;
● Assist/supervise the development of the relevant training materials and training delivery and support capacity development activities.
Interface with SAGs
● Work closely with the other thematic SAGs on the improved understanding of the element cycles, exchange processes and chemical transformations.
Interface with Expert Teams
● Work closely with ET-ACMQ on the assessment of the new measurement methodologies, quality assurance and control tools and the revision of existing measurement guidance;
● Work closely with ET-ACMQ on the establishment of good practice guidelines and common procedures for quality assurance;
● Work with the ET- ACDM on the data archival and availability in the WMO World Data Centers and the needs for additional variable and related metadata;
● Work closely with ET- ACNDE on the provision of the user requirement for the deposition related applications.
Interface with GAW initiatives steering committees
● Advise MMF-GTAD Steering committee on the research related to measurement-model fusion methodologies to obtain total deposition estimates.
Interface with WMO groups
● Collaborate with the WMO and co-sponsored programmes on the aspects of deposition within the Earth System approach by addressing weather (precipitation), hydrological, agriculture and ocean research .
Interface with external users and partners
● Outreach to other scientific and non-scientific communities regarding the state of science related to atmospheric deposition of major ions and other chemicals, including the work of the MMF-GTAD initiative, as well as proper understanding and use of measurement data;
● Communicate the availability of GAW observations to user communities, including ecosystem effects and atmospheric modelling communities.
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