Data Recovery in the Middle-east Rainfall

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1 MedCLIVAR-HyMeX Workshop, Barcelona, 7 th Sept 2009 Data Recovery in the Middle-east Rainfall Pinhas Alpert Tel-Aviv University, Israel

2 Some Rainfall Recovery Efforts in the GLOWA-Jordan River Middle-East Zahng et al, CDC, USA Yatagai etal., APHRODITE, JAPAN Halfon et al, 2008 Alpert- Rainfall from Cellular Data Conclusions

3 Development of a daily gridded precipitation data set for the Middle East A. Yatagai, P. Xie, and P. Alpert Yatagai, A., P. Xie and P. Alpert (2008): Development of a daily gridded precipitation data set for the Middle East, Adv.in Geosci., 12,

4

5 February Rain Climatology

6 Julian Day=306 Rain Climatology

7

8 Significance of high-resolution modeling for orographic rain Climate run Kitoh, Yatagai and Alpert, 2008: First super-high-resolution model projection that the ancient Fertile Crescent will disappear in this century. Hydrological Research Letters, p.1-4, 2008 A. Yatagai, P. Alpert and P. Xie, "Development of a daily gridded precipitation data set for the Middle East, Advance in Geosciences., 12, 1-6, F. Jin, J., A. Kitoh and P. Alpert, "Global warming projected water cycle changes over the Mediterranean, East and West: A comparison study of a super-high resolution global model with CMIP3".Phil. Trans. Roy. Soc. A., 368, 1-13, D terrain following rainfall model

9 Annual Precipitation- Middle East (mm/year) EMclim IPCC AR4 models CRU 20-km model

10 Total seasonal (Oct-Apr) average precipitation for

11 Comparison of average total observed seasonal P The six stations are from south-to-north, Egypt---Cairo (Ca,); Israel---Beer-Sheva (Bs), Tel-Aviv (Ta), Haifa (Hf); Lebanon---Beirut (Be) and Turkey---Adana (Ad). Unit: mm/season. F. Jin, J., A. Kitoh and P. Alpert, "Global warming projected water cycle changes over the Mediterranean, East and West: A comparison study of a super-high resolution global model with CMIP3".Phil. Trans. Roy. Soc. A., 368, 1-13, 2010.

12 Unknown Rainfall Max P. Alpert and H. Shafir, Meso gamma scale distribution of orographic precipitation: numerical study and comparison with precipitation derived from radar measurements J. Appl. Meteor., 28, , 1989 P. Alpert and H. Shafir, A physical model to complement rainfall normals over complex terrain, J. Hydrol., 110, 51-62, 1989

13 New Method- Cellular Data Study of Precipitation by Cellular networks Prof. Pinhas Alpert Department of Geophysics & Planetary Sciences, Head Tel-Aviv University, Israel With: Asaf Reiysfeld, Artem Zinevich Prof. Hagit Messer-Yaron Oren Goldshtein, Amit Firsten, Noam David

14 Phase 2: Studying 2D Moisture Distribution over Israel At this stage the ability to reconstruct 2D moisture distribution maps of Israel will be examined. The microwave links available for use are depicted below (green): N. David, Alpert, P., and Messer, H, "Technical Note: Novel method for water vapour monitoring using wireless communication networks measurements", Atmos. Chem. Phys., 9, , 2009.

15 Rain Station (from Ilan Setter) Map of links (mainly Cellcom, Pelefone -s. of NATBAG

16 Improved global rainfall climatology Using commercial links Most problematic world regions are: 1. Developing countries, e.g. Africa (UN request, Ethipia student) 2. Inaccessible areas like steep topography; The Alps (PROCEMA virtual institute) 3. Urban areas- effects of anthropogenic activities on rainfall, moisture

17 FY Asian Precipitation -- Highly Resolved Observational Data Integration Towards Evaluation of the Water Resources (APHRODITE s Water Resources) Akiyo Yatagai 1, Natsuko Yasutomi 1, Atsushi Hamada 1, Makoto Taniguchi 1, Tsugihiro Watanabe 1, Jumpei Kubota 1, Akio Kitoh 2, Kenji Kamiguchi 2, Osamu Arakawa 2, 1. Research Institute for Humanity and Nature (RIHN), Kyoto, Japan 2. Meteorological Research Institute (MRI), Japan Meteorological Agency (JMA), Tsukuba, Japan

18 Background Regional impact of global warming is estimated by using high-resolution climate models. Model validation: High resolution Accuracy(Quantified) Statistical downscaling: Long-term data Climate impact on hydrological resources: Grid precipitation data Extreme events:high resolution Accuracy Long-term data Hydrological resources over mountains: grid precipitation data+snow accumulation+ temperature A collaboration study with Dr. Pingping XIE (CPC/NOAA) for RIHN s Yellow River project during FY (Xie et al., 2007)

19 Grid precipitation data used for model validation (5yrs ago) Data set Source Coverage Time Horizontal resolution resolution Period Legates and Willmott Rain gauge Global Land climatology 0.5 deg GPCP Merged (GTS, IR, CMAP MW) Global monthly GPCP_pen CMAP_pen Merged Global pentad GPCP1DD IR Global daily CRU GPCC Rain gauge Global Land monthly 0.5 PREC/L ver TRMM PR,TMI,VIRS 37N-37S Path 4.3km(PR) B42(Ver6) 50N-50S 3-hrly CMORPH MW+IR 60N-60S 30min GSMaP_TMI TRMM/TMI 40N-40S Daily GSMaP_MVK MW+IR 60N-60S hrly Regional East Asia 0.5 Precipita (1961- (Xie et al.2007) Rain gauge Regional daily 0.05(clim) APHRODITE tion APHRO 2003CHN) Asia analysis ver.1003 India Rain gauge Regional daily Reanalysis CPC unified ECMWF JRA NCEP Atmospheric observation+ 4DDA(model) Global 6-hrly 0.5~ , 0.25 deg

20 Can we use satellite-based daily precipitation data to study extreme events? Daily Precipitation for June to August, 2000 at Kagoshima (mm/day) Satellite-based observation underestimates heavy precipitation compared to rain-gauge-based observation (Radar-AMeDAS) Radar-AMeDAS GPCP-1DD TRMM3B42 Satellite-based rainfall estimation is not sufficient to validate extreme precipitation events simulated by high-resolution models

21

22 Current (most updated) APHRODITE precipitation data V1003 Products MA: Monsoon Asia ME: Middle East RU: Russia (Figure 1 shows the domains of V1003) V1005 JP Products JP: Japan Period MA/ME/RU: JP: Resolution Temporal: daily Horizontal:0.5º 0.5º / 0.25º 0.25º 0.05º 0.05º (JP_V1005) Free of Charge

23 Data used in V1003

24

25 Algorithm Flow

26 1. Define monthly precipitation climatology from daily and monthly observations at each station 2. Compute the ratio of (1) to the WORLDCLIM 3. Interpolate (2) onto a 0.05-degree grid using the new weighted mean method based on Spheremap (Willmott et al. 1985) 4. Define daily precipitation climatology by Fourier interpolation with the first six harmonics 5. Compute the ratio of the daily observation to the daily climatology (4) for the target day 6. Interpolate (5) onto a 0.05-degree grid using the same method used in (3) 7. Regrid 0.05-degree data (6) to and 0.5-degree products using the area-weighted mean

27 A QC tool with Google Earth A ( a global dataset) Example: Annual precipitation in 1995 at Kathmandu AP. Directly obtained from Department of Hydrometorology, Nepal B (GTS base real-time data) Dataset A and B are 1/10 of our data. Error in units-ofmeasurement are detected in widely used global datasets!

28 Definition of daily climatology

29 Daily precipitation I asked my colleague to send a slide which contains a movie. At Plinius conference, I did not use a movie but showed many consecutive slides. I will send them later.

30 precipitation analysis (Jan, 2000)

31 The followings are application samples. For satellite works, I will send later.

32 Post process of Numerical Weather Forecasts (NWF) as a teacher data Improving forecast (Krishnamurti et al. 2009) Observed Rain = a * (Model Rain) + b APHRO product Model rain GCM+statistical downscaling Forecasting precipitation variability Super-ensemble forecast

33 Validation of climate models/evaluation of the Hydrological budget caused by global warming APHRO_ME_0804 Annual precipitation global warming APHRO_ME_0804 年 降 水 MRI 20km model (present) Change in River Run-off Kitoh et al. (2008a) HRL Yatagai et al. (2008) ADGEO Kitoh et al. (2008b) HRL

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