deep learning for satellite precipitation estimation · deep learning for geoscience 2 deep...
TRANSCRIPT
IMPLEMENTED BY
Deep learning for
satellite precipitation
estimation
• A. Moraux, S. Dewitte, B. Cornelis & A. Munteanu
• Royal Meteorological Institute of Belgium & Vrije Universiteit Brussel
IMPLEMENTED BY
Deep learning for geoscience
2
Deep learning and process
understanding for data-driven Earth
system science. Nature, 2019
M. Reichstein et al.
IMPLEMENTED BY
Deep learning for climatology
3
Deep learning for multi-year ENSO forecasts. Nature, 2019
Y. G Ham, J. H. Kim, & J. J. Luo
IMPLEMENTED BY
Importance of precipitation estimation
4
Daily precipitation accumulationInstantaneous precipitation rate
Courtesy of M. Journée RMI belgian radars composite
Precipitation Nowcasting
IMPLEMENTED BY
Different observation tools:
5
3) Satellite radiometers
1) Rain gauges
2) Weather radar
IMPLEMENTED BY
Rain gauges
6
IMPLEMENTED BY
Radar
7
Estimate precipitation from
electromagnetic pulse reflection
measurementsZ=aR𝑏
Z =
Reflectivity
R =
Precipitation rate
a, b =
empirical
coefficients
Courtesy of L. Delobbe
IMPLEMENTED BY
Satellite radiometer
8
Meteosat Second
Generation
Full disc imagery in 12
spectral channels
Visible and infrared
3 km spatial resolution
15 minutes temporal
resolution
IMPLEMENTED BY
Satellite radiometer
9
Cloud physical properties
Red: Optical depth
Green: Water phase
(water/ice) and particle
size
Blue: Temperature
IMPLEMENTED BY
Multimodal and multiscale deep learning model for precipitation estimation
10
IMPLEMENTED BY
11
IMPLEMENTED BY
Model training
12
Rain gauges measurements
Satellite channels
IMPLEMENTED BY
Data splitting
13
Proper data splitting both in time and space is necessary for correct performance evaluation
➔Not randomly !
IMPLEMENTED BY
Study case: winter rain
14
Our DL model
Traditional
methods
IMPLEMENTED BY
Study case: summer rain
15
Our DL model
Traditional
methods
IMPLEMENTED BY
Future studies
16
Use radar, combined with satellite and rain gauges
➢ Further improve precipitation estimation and resolution
Develop a model with only satellite data as input
➢ Global coverage precipitation product
IMPLEMENTED BY
Future Eumetnet workshop on Artificial Intelligence for weather and climate
17
⚫ When: 26-27 February 2020
⚫ Where: Brussels
⚫ Inscription: https://events.spacepole.be/e/AI
⚫ For more information: [email protected]
IMPLEMENTED BY
Appendix: Performance scores
18
1) Precipitation detection
2) Precipitation rate
estimation