subtropical cyclones diabatic energy sources baroclinic energy sources adapted from fig. 9 in beven...
TRANSCRIPT
![Page 1: Subtropical Cyclones Diabatic Energy Sources Baroclinic Energy Sources Adapted from Fig. 9 in Beven (2012) 30 th Conference on Hurricanes and Tropical](https://reader033.vdocuments.us/reader033/viewer/2022051401/56649ea95503460f94baceec/html5/thumbnails/1.jpg)
Subtropical Cyclones
DiabaticEnergy Sources
BaroclinicEnergy Sources
Adapted from Fig. 9 in Beven (2012)30th Conference on Hurricanes and Tropical Meteorology
TCs Subtropical cyclones
Frontal cyclones
![Page 2: Subtropical Cyclones Diabatic Energy Sources Baroclinic Energy Sources Adapted from Fig. 9 in Beven (2012) 30 th Conference on Hurricanes and Tropical](https://reader033.vdocuments.us/reader033/viewer/2022051401/56649ea95503460f94baceec/html5/thumbnails/2.jpg)
• Davis (2010) methodology:– Based on Ertel potential vorticity (PV)– Formulated in terms of two PV metrics that quantify the relative
contributions of baroclinic processes and condensation heating to the evolution of individual cyclones
• Davis (2010) methodology is similar to Hart (2003) cyclone phase space diagrams
Adapted Davis (2010) Methodology
![Page 3: Subtropical Cyclones Diabatic Energy Sources Baroclinic Energy Sources Adapted from Fig. 9 in Beven (2012) 30 th Conference on Hurricanes and Tropical](https://reader033.vdocuments.us/reader033/viewer/2022051401/56649ea95503460f94baceec/html5/thumbnails/3.jpg)
Adapted Davis (2010) Methodology
• Lower-troposphericbaroclinic processes:(near-surface potentialtemperature anomaly)
absolute vorticity
425 hPa
Potential temperature anomaly Length of 6° box centered on cyclone
![Page 4: Subtropical Cyclones Diabatic Energy Sources Baroclinic Energy Sources Adapted from Fig. 9 in Beven (2012) 30 th Conference on Hurricanes and Tropical](https://reader033.vdocuments.us/reader033/viewer/2022051401/56649ea95503460f94baceec/html5/thumbnails/4.jpg)
Adapted Davis (2010) Methodology
PV1/PV2 : measure of the contribution of lower-troposphericbaroclinic processes relative to the contribution of condensation heating
• Lower-troposphericbaroclinic processes:(near-surface potentialtemperature anomaly)
• Midtroposphericlatent heat release:(interior PV anomaly)
425 hPa
Ertel PV anomaly
Potential temperature anomaly Length of 6° box centered on cyclone
absolute vorticity
![Page 5: Subtropical Cyclones Diabatic Energy Sources Baroclinic Energy Sources Adapted from Fig. 9 in Beven (2012) 30 th Conference on Hurricanes and Tropical](https://reader033.vdocuments.us/reader033/viewer/2022051401/56649ea95503460f94baceec/html5/thumbnails/5.jpg)
Adapted Davis (2010) Methodology
200 hPa
925 hPa
![Page 6: Subtropical Cyclones Diabatic Energy Sources Baroclinic Energy Sources Adapted from Fig. 9 in Beven (2012) 30 th Conference on Hurricanes and Tropical](https://reader033.vdocuments.us/reader033/viewer/2022051401/56649ea95503460f94baceec/html5/thumbnails/6.jpg)
Lower-tropospheric baroclinic processes (PV1)
200 hPa
925 hPa
Adapted Davis (2010) Methodology
• Lower-troposphericbaroclinic processes:(near-surface potentialtemperature anomaly)
![Page 7: Subtropical Cyclones Diabatic Energy Sources Baroclinic Energy Sources Adapted from Fig. 9 in Beven (2012) 30 th Conference on Hurricanes and Tropical](https://reader033.vdocuments.us/reader033/viewer/2022051401/56649ea95503460f94baceec/html5/thumbnails/7.jpg)
Lower-tropospheric baroclinic processes (PV1)
200 hPa
925 hPa
Adapted Davis (2010) Methodology
• Lower-troposphericbaroclinic processes:(near-surface potentialtemperature anomaly)
• Midtroposphericlatent heat release:(interior PV anomaly)
![Page 8: Subtropical Cyclones Diabatic Energy Sources Baroclinic Energy Sources Adapted from Fig. 9 in Beven (2012) 30 th Conference on Hurricanes and Tropical](https://reader033.vdocuments.us/reader033/viewer/2022051401/56649ea95503460f94baceec/html5/thumbnails/8.jpg)
500 hPa
Lower-tropospheric baroclinic processes (PV1)
200 hPa
925 hPa
Adapted Davis (2010) Methodology
Midtroposphericlatent heat release
(PV2)
• Lower-troposphericbaroclinic processes:(near-surface potentialtemperature anomaly)
• Midtroposphericlatent heat release:(interior PV anomaly)
PV1/PV2 : measure of the contribution of lower-tropospheric baroclinic processes relative to the contribution of condensation heating
![Page 9: Subtropical Cyclones Diabatic Energy Sources Baroclinic Energy Sources Adapted from Fig. 9 in Beven (2012) 30 th Conference on Hurricanes and Tropical](https://reader033.vdocuments.us/reader033/viewer/2022051401/56649ea95503460f94baceec/html5/thumbnails/9.jpg)
Adapted Davis (2010) Methodology
• Additional metric introduced to diagnose upper-tropospheric dynamical processes
• Upper-troposphericdynamical processes:(upper-tropospheric PV anomaly)
Ertel PV anomaly
300 hPa
Length of 6° box centered on cyclone
![Page 10: Subtropical Cyclones Diabatic Energy Sources Baroclinic Energy Sources Adapted from Fig. 9 in Beven (2012) 30 th Conference on Hurricanes and Tropical](https://reader033.vdocuments.us/reader033/viewer/2022051401/56649ea95503460f94baceec/html5/thumbnails/10.jpg)
500 hPa
Lower-tropospheric baroclinic processes (PV1)
200 hPa
925 hPa
Adapted Davis (2010) Methodology
Midtroposphericlatent heat release
(PV2)
• Lower-troposphericbaroclinic processes:(near-surface potentialtemperature anomaly)
• Midtroposphericlatent heat release:(interior PV anomaly)
PV1/PV2 : measure of the contribution of lower-troposphericbaroclinic processes relative to the contribution of condensation heating
![Page 11: Subtropical Cyclones Diabatic Energy Sources Baroclinic Energy Sources Adapted from Fig. 9 in Beven (2012) 30 th Conference on Hurricanes and Tropical](https://reader033.vdocuments.us/reader033/viewer/2022051401/56649ea95503460f94baceec/html5/thumbnails/11.jpg)
500 hPa
Lower-tropospheric baroclinic processes (PV1)
200 hPa
925 hPa
Adapted Davis (2010) Methodology
Midtroposphericlatent heat release
(PV2)
Upper-troposphericdynamical processes
(PV3)
• Lower-troposphericbaroclinic processes:(near-surface potentialtemperature anomaly)
• Midtroposphericlatent heat release:(interior PV anomaly)
• Upper-troposphericdynamical processes:(upper-tropospheric PV anomaly)
PV1/PV2 : measure of the contribution of lower-troposphericbaroclinic processes relative to the contribution of condensation heating
![Page 12: Subtropical Cyclones Diabatic Energy Sources Baroclinic Energy Sources Adapted from Fig. 9 in Beven (2012) 30 th Conference on Hurricanes and Tropical](https://reader033.vdocuments.us/reader033/viewer/2022051401/56649ea95503460f94baceec/html5/thumbnails/12.jpg)
500 hPa
Lower-tropospheric baroclinic processes (PV1)
200 hPa
925 hPa
Adapted Davis (2010) Methodology
Midtroposphericlatent heat release
(PV2)
Upper-troposphericdynamical processes
(PV3)
PV1/PV2 : measure of the contribution of lower-troposphericbaroclinic processes relative to the contribution of condensation heating
Calculated from the 0.5° Climate ForecastSystem Reanalysis
V2 dataset
![Page 13: Subtropical Cyclones Diabatic Energy Sources Baroclinic Energy Sources Adapted from Fig. 9 in Beven (2012) 30 th Conference on Hurricanes and Tropical](https://reader033.vdocuments.us/reader033/viewer/2022051401/56649ea95503460f94baceec/html5/thumbnails/13.jpg)
Hurricane Sandy: 6° × 6° box, NHC Best Track
Pea
ks in
PV
3
PV
1/P
V2
22 O
ctob
er
23 O
ctob
er
24 O
ctob
er
25 O
ctob
er
26 O
ctob
er
27 O
ctob
er
28 O
ctob
er
29 O
ctob
er
30 O
ctob
er
31 O
ctob
er
PV
U
![Page 14: Subtropical Cyclones Diabatic Energy Sources Baroclinic Energy Sources Adapted from Fig. 9 in Beven (2012) 30 th Conference on Hurricanes and Tropical](https://reader033.vdocuments.us/reader033/viewer/2022051401/56649ea95503460f94baceec/html5/thumbnails/14.jpg)
Hurricane Sandy: 10° × 10° box, NHC Best Track
Pea
ks in
PV
3
PV
1/P
V2 P
VU
22 O
ctob
er
23 O
ctob
er
24 O
ctob
er
25 O
ctob
er
26 O
ctob
er
27 O
ctob
er
28 O
ctob
er
29 O
ctob
er
30 O
ctob
er
31 O
ctob
er
![Page 15: Subtropical Cyclones Diabatic Energy Sources Baroclinic Energy Sources Adapted from Fig. 9 in Beven (2012) 30 th Conference on Hurricanes and Tropical](https://reader033.vdocuments.us/reader033/viewer/2022051401/56649ea95503460f94baceec/html5/thumbnails/15.jpg)
Hurricane Sandy: 12° × 12° box, NHC Best Track
Pea
ks in
PV
3
PV
1/P
V2 P
VU
22 O
ctob
er
23 O
ctob
er
24 O
ctob
er
25 O
ctob
er
26 O
ctob
er
27 O
ctob
er
28 O
ctob
er
29 O
ctob
er
30 O
ctob
er
31 O
ctob
er
![Page 16: Subtropical Cyclones Diabatic Energy Sources Baroclinic Energy Sources Adapted from Fig. 9 in Beven (2012) 30 th Conference on Hurricanes and Tropical](https://reader033.vdocuments.us/reader033/viewer/2022051401/56649ea95503460f94baceec/html5/thumbnails/16.jpg)
Hurricane Sandy: 14° × 14° box, NHC Best Track
PV
U
PV
1/P
V2
Pea
ks in
PV
3
22 O
ctob
er
23 O
ctob
er
24 O
ctob
er
25 O
ctob
er
26 O
ctob
er
27 O
ctob
er
28 O
ctob
er
29 O
ctob
er
30 O
ctob
er
31 O
ctob
er
![Page 17: Subtropical Cyclones Diabatic Energy Sources Baroclinic Energy Sources Adapted from Fig. 9 in Beven (2012) 30 th Conference on Hurricanes and Tropical](https://reader033.vdocuments.us/reader033/viewer/2022051401/56649ea95503460f94baceec/html5/thumbnails/17.jpg)
Hurricane Sandy: 16° × 16° box, NHC Best Track
PV
U
PV
1/P
V2
Pea
ks in
PV
3
22 O
ctob
er
23 O
ctob
er
24 O
ctob
er
25 O
ctob
er
26 O
ctob
er
27 O
ctob
er
28 O
ctob
er
29 O
ctob
er
30 O
ctob
er
31 O
ctob
er
![Page 18: Subtropical Cyclones Diabatic Energy Sources Baroclinic Energy Sources Adapted from Fig. 9 in Beven (2012) 30 th Conference on Hurricanes and Tropical](https://reader033.vdocuments.us/reader033/viewer/2022051401/56649ea95503460f94baceec/html5/thumbnails/18.jpg)
Hurricane Sandy: 18° × 18° box, NHC Best Track
PV
U
PV
1/P
V2
Pea
ks in
PV
3
22 O
ctob
er
23 O
ctob
er
24 O
ctob
er
25 O
ctob
er
26 O
ctob
er
27 O
ctob
er
28 O
ctob
er
29 O
ctob
er
30 O
ctob
er
31 O
ctob
er
![Page 19: Subtropical Cyclones Diabatic Energy Sources Baroclinic Energy Sources Adapted from Fig. 9 in Beven (2012) 30 th Conference on Hurricanes and Tropical](https://reader033.vdocuments.us/reader033/viewer/2022051401/56649ea95503460f94baceec/html5/thumbnails/19.jpg)
Hurricane Sandy: 20° × 20° box, NHC Best Track
PV
U
PV
1/P
V2
Pea
ks in
PV
3
22 O
ctob
er
23 O
ctob
er
24 O
ctob
er
25 O
ctob
er
26 O
ctob
er
27 O
ctob
er
28 O
ctob
er
29 O
ctob
er
30 O
ctob
er
31 O
ctob
er
![Page 20: Subtropical Cyclones Diabatic Energy Sources Baroclinic Energy Sources Adapted from Fig. 9 in Beven (2012) 30 th Conference on Hurricanes and Tropical](https://reader033.vdocuments.us/reader033/viewer/2022051401/56649ea95503460f94baceec/html5/thumbnails/20.jpg)
500 hPa
Lower-tropospheric baroclinic processes (PV1)
200 hPa
925 hPa
Adapted Davis (2010) Methodology
Midtroposphericlatent heat release
(PV2)
Upper-troposphericdynamical processes
(PV3)
• Lower-troposphericbaroclinic processes:(near-surface potentialtemperature anomaly)
• Midtroposphericlatent heat release:(interior PV anomaly)
• Upper-troposphericdynamical processes:(upper-tropospheric PV anomaly)
PV1/PV2 : measure of the contribution of lower-troposphericbaroclinic processes relative to the contribution of condensation heating
![Page 21: Subtropical Cyclones Diabatic Energy Sources Baroclinic Energy Sources Adapted from Fig. 9 in Beven (2012) 30 th Conference on Hurricanes and Tropical](https://reader033.vdocuments.us/reader033/viewer/2022051401/56649ea95503460f94baceec/html5/thumbnails/21.jpg)
300 hPa
Lower-tropospheric baroclinic processes (PV1)
200 hPa
925 hPa
Adapted Davis (2010) Methodology
Midtroposphericlatent heat release
(PV2)
Upper-troposphericdynamical processes
(PV3)
• Lower-troposphericbaroclinic processes:(near-surface potentialtemperature anomaly)
• Midtroposphericlatent heat release:(interior PV anomaly)
• Upper-troposphericdynamical processes:(upper-tropospheric PV anomaly)
PV1/PV2 : measure of the contribution of lower-troposphericbaroclinic processes relative to the contribution of condensation heating
![Page 22: Subtropical Cyclones Diabatic Energy Sources Baroclinic Energy Sources Adapted from Fig. 9 in Beven (2012) 30 th Conference on Hurricanes and Tropical](https://reader033.vdocuments.us/reader033/viewer/2022051401/56649ea95503460f94baceec/html5/thumbnails/22.jpg)
Hurricane Sandy: 6° × 6° box, 500 hPa, NHC Best Track
Pea
ks in
PV
3
22 O
ctob
er
23 O
ctob
er
24 O
ctob
er
25 O
ctob
er
26 O
ctob
er
27 O
ctob
er
28 O
ctob
er
29 O
ctob
er
30 O
ctob
er
31 O
ctob
er
PV
U
PV
1/P
V2
![Page 23: Subtropical Cyclones Diabatic Energy Sources Baroclinic Energy Sources Adapted from Fig. 9 in Beven (2012) 30 th Conference on Hurricanes and Tropical](https://reader033.vdocuments.us/reader033/viewer/2022051401/56649ea95503460f94baceec/html5/thumbnails/23.jpg)
Pea
ks in
PV
3
22 O
ctob
er
23 O
ctob
er
24 O
ctob
er
25 O
ctob
er
26 O
ctob
er
27 O
ctob
er
28 O
ctob
er
29 O
ctob
er
30 O
ctob
er
31 O
ctob
er
Hurricane Sandy: 6° × 6° box, 300 hPa, NHC Best Track
PV
U
PV
1/P
V2
![Page 24: Subtropical Cyclones Diabatic Energy Sources Baroclinic Energy Sources Adapted from Fig. 9 in Beven (2012) 30 th Conference on Hurricanes and Tropical](https://reader033.vdocuments.us/reader033/viewer/2022051401/56649ea95503460f94baceec/html5/thumbnails/24.jpg)
300 hPa
Lower-tropospheric baroclinic processes (PV1)
200 hPa
925 hPa
Adapted Davis (2010) Methodology
Midtroposphericlatent heat release
(PV2)
Upper-troposphericdynamical processes
(PV3)
• Lower-troposphericbaroclinic processes:(near-surface potentialtemperature anomaly)
• Midtroposphericlatent heat release:(interior PV anomaly)
• Upper-troposphericdynamical processes:(upper-tropospheric PV anomaly)
PV1/PV2 : measure of the contribution of lower-troposphericbaroclinic processes relative to the contribution of condensation heating
![Page 25: Subtropical Cyclones Diabatic Energy Sources Baroclinic Energy Sources Adapted from Fig. 9 in Beven (2012) 30 th Conference on Hurricanes and Tropical](https://reader033.vdocuments.us/reader033/viewer/2022051401/56649ea95503460f94baceec/html5/thumbnails/25.jpg)
500 hPa
Lower-tropospheric baroclinic processes (PV1)
200 hPa
925 hPa
Adapted Davis (2010) Methodology
Midtroposphericlatent heat release
(PV2)
Upper-troposphericdynamical processes
(PV3)
PV1/PV2 : measure of the contribution of lower-troposphericbaroclinic processes relative to the contribution of condensation heating
Calculated from the 0.5° Climate ForecastSystem Reanalysis
V2 dataset