 |
|
Cluster Analysis using HYSPLIT Trajectories
|
Examining the Global Clusters by Location
The tables and graphics generated on this page are for a specific location
which is rounded to the nearest 10 degrees of latitude and longitude.
The input data convention is that negative values are for South and West.
The tabular results are shown below, after pressing Update. They are
summarized by decade, cluster number, percent of the trajectories in each cluster,
and the average duration of each cluster, which is defined as the number of
sequential trajectories that had the same cluster number, a measure of the
persistence of that weather or flow pattern. The average temperature and
pressure at the trajectory starting point is also tabulated. The last row
lists the decadal mean for each quantity. The trajectory graphic for each
decade shows the mean trajectory for each cluster. Because the clustering process
averages trajectories together that have the least spatial variance compared to
all other trajectory pairs examined, slight differences in flow patterns may
cause the cluster mean trajectories identified by the same cluster ID number
to have different upwind origins each decade. The topmost graphic summarizes the
decadal trends as a departure from the 75 year mean for the cluster
persistence, origin temperature,
and pressure.
 |
Positions are internally rounded to the nearest 10 degrees.
|
 | Results for 1950 through 1959 ... at 70S 120ECluster
Number | Percent
| Duration
(h) | Temp
(oC) | Press
(hPa) |
|---|
1 | 12.5 | 24.5 | -28.6 | 594.3 |
2 | 11.7 | 20.4 | -30.2 | 592.0 |
3 | 9.9 | 25.3 | -26.6 | 596.6 |
4 | 11.7 | 29.4 | -27.5 | 595.5 |
5 | 12.1 | 23.1 | -30.6 | 590.6 |
6 | 15.6 | 25.6 | -32.0 | 588.3 |
7 | 13.5 | 19.8 | -32.9 | 586.3 |
8 | 13.1 | 19.5 | -32.1 | 588.6 |
Mean | 100.0 | 23.1 | -30.3 | 591.2 |
|
 | Results for 1960 through 1969 ... at 70S 120ECluster
Number | Percent
| Duration
(h) | Temp
(oC) | Press
(hPa) |
|---|
1 | 8.9 | 22.7 | -27.0 | 594.4 |
2 | 12.3 | 23.8 | -29.5 | 592.1 |
3 | 7.6 | 27.1 | -27.3 | 593.4 |
4 | 6.2 | 20.5 | -31.5 | 588.2 |
5 | 25.6 | 41.2 | -31.9 | 586.8 |
6 | 15.7 | 22.8 | -34.1 | 583.9 |
7 | 15.6 | 21.2 | -33.4 | 586.4 |
8 | 8.1 | 14.0 | -31.4 | 589.7 |
Mean | 100.0 | 25.1 | -31.3 | 588.4 |
|
 | Results for 1970 through 1979 ... at 70S 120ECluster
Number | Percent
| Duration
(h) | Temp
(oC) | Press
(hPa) |
|---|
1 | 11.3 | 19.2 | -29.5 | 591.0 |
2 | 10.2 | 22.1 | -27.7 | 593.4 |
3 | 10.3 | 30.8 | -26.1 | 594.8 |
4 | 11.1 | 27.1 | -30.7 | 588.2 |
5 | 15.5 | 26.3 | -31.3 | 585.7 |
6 | 11.2 | 18.4 | -32.0 | 585.1 |
7 | 13.5 | 20.5 | -33.3 | 584.2 |
8 | 16.9 | 22.8 | -31.8 | 587.5 |
Mean | 100.0 | 23.0 | -30.5 | 588.3 |
|
 | Results for 1980 through 1989 ... at 70S 120ECluster
Number | Percent
| Duration
(h) | Temp
(oC) | Press
(hPa) |
|---|
1 | 20.1 | 35.4 | -29.4 | 591.8 |
2 | 9.9 | 17.5 | -31.4 | 589.5 |
3 | 19.0 | 24.5 | -32.9 | 586.5 |
4 | 17.2 | 24.5 | -31.8 | 586.8 |
5 | 10.0 | 20.0 | -32.7 | 584.7 |
6 | 10.8 | 21.1 | -32.5 | 586.6 |
7 | 5.6 | 14.9 | -31.0 | 589.5 |
8 | 7.3 | 19.2 | -30.0 | 591.4 |
Mean | 100.0 | 23.4 | -31.5 | 588.3 |
|
 | Results for 1990 through 1999 ... at 70S 120ECluster
Number | Percent
| Duration
(h) | Temp
(oC) | Press
(hPa) |
|---|
1 | 0.4 | 8.6 | -27.2 | 592.4 |
2 | 9.2 | 19.2 | -31.4 | 588.5 |
3 | 17.3 | 24.0 | -33.5 | 586.2 |
4 | 20.1 | 28.8 | -32.6 | 587.7 |
5 | 15.2 | 28.4 | -32.9 | 586.6 |
6 | 8.6 | 19.8 | -34.1 | 583.5 |
7 | 11.4 | 19.7 | -33.1 | 584.9 |
8 | 17.9 | 28.1 | -31.4 | 588.3 |
Mean | 100.0 | 24.6 | -32.6 | 586.8 |
|
 | Results for 2000 through 2009 ... at 70S 120ECluster
Number | Percent
| Duration
(h) | Temp
(oC) | Press
(hPa) |
|---|
1 | 21.7 | 27.6 | -30.1 | 588.7 |
2 | 10.7 | 19.2 | -29.6 | 590.0 |
3 | 12.5 | 22.6 | -28.7 | 592.2 |
4 | 10.9 | 20.9 | -30.1 | 590.6 |
5 | 11.7 | 23.5 | -31.2 | 585.9 |
6 | 9.1 | 21.6 | -30.5 | 586.6 |
7 | 5.9 | 14.0 | -32.4 | 584.3 |
8 | 17.5 | 26.7 | -31.3 | 587.1 |
Mean | 100.0 | 23.0 | -30.4 | 588.4 |
|
 | Results for 2010 through 2019 ... at 70S 120ECluster
Number | Percent
| Duration
(h) | Temp
(oC) | Press
(hPa) |
|---|
1 | 16.6 | 23.6 | -30.8 | 588.1 |
2 | 18.4 | 24.3 | -29.8 | 590.9 |
3 | 14.8 | 20.4 | -31.4 | 589.4 |
4 | 13.9 | 19.3 | -32.8 | 587.5 |
5 | 15.4 | 27.5 | -32.2 | 586.3 |
6 | 8.2 | 22.8 | -32.9 | 582.6 |
7 | 12.3 | 20.9 | -32.4 | 586.1 |
8 | 0.3 | 10.8 | -29.9 | 587.8 |
Mean | 100.0 | 22.7 | -31.6 | 587.8 |
|
 | Results for 2020 through 2024 ... at 70S 120ECluster
Number | Percent
| Duration
(h) | Temp
(oC) | Press
(hPa) |
|---|
1 | 10.7 | 19.6 | -29.4 | 588.6 |
2 | 11.3 | 22.6 | -31.6 | 586.3 |
3 | 13.0 | 19.2 | -32.6 | 585.0 |
4 | 23.3 | 29.2 | -31.2 | 587.2 |
5 | 8.1 | 16.5 | -30.8 | 587.3 |
6 | 0.9 | 9.5 | -27.1 | 593.0 |
7 | 18.7 | 26.9 | -31.0 | 587.6 |
8 | 13.9 | 21.8 | -29.0 | 589.9 |
Mean | 100.0 | 23.0 | -30.8 | 587.5 |
|