Catt Tutorial

Combined Aerosol Trajectory Tool, CATT Illustrated Instruction Manual Supported by: MARAMA contract on behalf of Mid-Atlantic/Northeast Visibility Union (MANE-VU) for the Inter-RPO Workgroup for Data Analysis Supplemental funding from Environmental Protection Agency, OAQPS , Agreement # 83114101-0 National Science Foundation , Grant #0113868 Performed by the Center for Air Pollution Impact and Trend Analysis (CAPITA, Washington University In collaboration with Cooperative Institute for Research in the Atmosphere, CIRA-VIEWS Program January 10, 2004

Acknowledgements ,[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object]

Table of Contents ,[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object]

CATT Summary Links Single Site & Day Traj Percentile Filter User-Defined Trajectory Viewer All Visible Sites, Single Day Traj Pot. Src . Contr ,‘ Hopke’ Single Site, Time-Range Traj Inc. Prob. IP-‘Poirot’ Avg. Conc , DM ‘ Kenski’ Weighed Prob. WP-Green’ Gridded Transport Metrics Multi-Site, Single Day Traj

CATT Software Components and Data Flow ,[object Object],[object Object],[object Object]

The CATT Browser Web Page ,[object Object],[object Object],[object Object],[object Object]

Status and Navigation Bar ,[object Object],[object Object],[object Object],[object Object],[object Object]

Data Query (Q) Interface (Q) ,[object Object],[object Object],[object Object]

Trajectory rendering options (RT) ,[object Object]

Single day, single site back-trajectory browser http:// webapps . datafed .net/ dvoy _services/ datafed . aspx ?page=CATT/CATT_SS ,[object Object],[object Object],[object Object],[object Object],This simple CATT mode is most useful when the backtrajectory for a specific chemical data point is to be viewed. For instance, browsing the time series of a given location indicates a high value, for example 2001-05-04 at Shenandoah. Clicking on that day in the time view moves the cursor for that date and also shows the Shenandoah trajectory for that day.

Single day, multiple site back-trajectory browser http:// webapps . datafed .net/ dvoy _services/ datafed . aspx ?page=CATT/CATT_MS ,[object Object],[object Object],[object Object],[object Object],This CATT mode is helpful to show the airmass histories for a set of specific sites that have unique features identified by the user. In this mode, the list of receptor locations is fixed as specified by the loc_code_list (e.g. ACAD1 SHEN1 GRSM1 UPBU1). This mode may be useful when preparing transport-illustrations for a report.

Multi-site color-coded backtrajectories for sites with SO4f data ,[object Object],[object Object],[object Object],[object Object],[object Object],The trajectory rendering is enhanced by color-coding and by changing the line thickness of the trajectories in proportion to the magnitude of the parameter value. The trajectory rendering is set by the RT button. In this example, rainbow coloring is used.

Backtrajectories for organics OCf on the day of the Quebec smoke, 2002-07-07; b. Backtrajectories for a sulfate event 2002-07-30 Trajectories with receptor SO4 concentration near 0 are shown as thin blue line. Trajectories with receptor SO4 concentration over 20 ug/m3 are shown as heavier red lines. This color/thickness coding of trajectories conveys, in an intuitive way, the transport direction where ‘dirty’ and ‘clean’ air is coming from on a given day The map zoom rectangle was reset (by the magnifying glass icon), to cover the Eastern U.S. only In this mode, the list of receptor locations include all the sites that are in the zoom rectangle of the map view. Moving the location cursor in the map view will not change the selected trajectories.

Multi-site backtrajectories for 2001-05-04. a. All datab. SO4f > 20  g/m 3 ,[object Object],[object Object],[object Object],[object Object],[object Object],The SO4 parameter was restricted to expression = value > 0 and value > 20 respectively. Imposing a value filter can eliminate ‘irrelevant’ trajectories, while highlighting those with ‘interesting’ value range (high or low).

Ensemble backtrajectories for SOILf at Big Bend, 1992-2003 http:// webapps . datafed .net/ dvoy _services/ datafed . aspx ?page=CATT/CATT_SR ,[object Object],[object Object],[object Object],[object Object],The ensemble of backtrajectories to a single site illustrates the transport climatology to a specific site. Preferential airmass transport pathways are clearly evident in this view. This view shows the geographic boundary of the ATAD backtrajectories over the Gulf of Mexico. High receptor concentration trajectories are enhanced with reddish colors and thicker lines. The high SOILf concentration (red) is originating either from the SE or from the West.

High percentile of SO4f at Great Smoky Mountain site (95-100%); b. Low SO4f percentile trajectories at GRSM (0-5%) http:// webapps . datafed .net/ dvoy _services/ datafed . aspx ?page=CATT/CATT_SRP ,[object Object],[object Object],[object Object],[object Object],The percentile filter selects a subset of the chemical species based on the percentile (relative) values of the station concentration. This is a powerful mode of CATT since it can convey in a single view the transport direction of dirty and clean air as derived from long monitoring time series. Since it uses percentiles, it is ‘autoscaling’ the trajectory selection.

Seasonal transport, high and low percentile during summer (JJA) at GRSM Aggregations for specific seasons are intended to illustrate the transport conditions during differences of these seasons. The seasonal (actually monthly) filter is always imposed in addition to the other filter conditions (loc_filter, time_filter). The specific month to be used for the aggregation can be selected in the main query form accessible through the Q-button

Details of the Incremental Probability Metric ,[object Object],[object Object],Normalized Un-Filtered Restime matrix Normalized Filtered Restime matrix for LYBR, SO4f, 80 th percentile.

Incremental Probability map LYBR, SO4, (80%), 2000-20004 ,[object Object],[object Object]

Incremental Probability Metric, IP (‘Rich Poirot’ Metric) ,[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object]

Potential Source Contribution Function, PSCF (‘Phil Hopke’ Metric) ,[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object]

Grid-Average Concentration Metric, DM (‘Donna Kenski’ Metric) ,[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object]

Weighed Probability Metric, WP (‘Mark Green’ Metric) ,[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object]

TrajAgg viewer ,[object Object],[object Object]

Submission form for the chemical filter table ,[object Object],[object Object],[object Object]

Button ‘G ,[object Object],Reference Grid Settings (Same as for Traj_line Query)

[object Object],Button ‘O’ Grid Operator Button ‘R’ Grid Rendering

Transport of Different Species for Everglades, FL

Transport of SEf to Different Sites

Transport of NO3f to Different Sites

Sulfate Transport to BIBE, GRSM, and LBYR

Sulfate Transport Pattern on 2004-07-20

Average Concentration of Different Species – Dkenski Metric you guess the species 

OCf Concentration Field (DKenski Metric)

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