*A.Chiaudani, *G. Tridello, M. Borin**, A. Bonamano **, P. Rosso***, F.Vettore***

*ARPAV: Veneto Region Environment protection and prevention agency

**Padova University – Environmental Agronomy and Vegetal Production Department

***Veneto Region : Regional direction for the agroindustrial policies

CLIMATIC ADVERSITIES IN VENETO REGION AND CROP YELD LOSSES

reporting: A. Chiaudani – ARPAV

NATIONAL SOLIDARITY FUND COMPENSATIONS IN THE PERIOD 1978-2003;

In this work we have collected the administrative documentation of the adverse atmospheric events that resulted in compensation for damage, and available information in terms of:

• their temporal frequency• their territorial distribution • their risk calendar • the average vendible gross production damage at

municipal level

CALAMITOUS EVENTS COMPENSATED BY THE MINISTRY OF AGRICULTURAL AND FORESTALL POLICIES

01 HAIL 07 SIROCCO WINDS

02 WINTER FROST 08 EARTHQUAKE

03 PERSISTENT RAINFALL 09 TORNADO

04 DROUGHT 10 SPRING AND AUTUMM FROST

05 SNOW EXCESS 11 STRONG WINDS

06 ALLUVIAL RAINFALL 12 SEA STORM

FREQUENCY OF COMPENSATED ATMOSPHERIC EVENTS- 1978-2003

Violent rainfall1%

Hailstorm75%

Spring and autumn frost

3,2%

Landslip0,8%

Snow excess1%

Winter Frost0,4%

Sea storm0,4%

Drought1,6%

Strong wind2,2%

Alluvial rainfall5,8%

Tornado13%

N° OF COMPENSATED MUNICIPALITIES1978-2003

hailstrom59,7%

spring and autumn frozen

1,6%

landsplip1,6%

seastorm0,4%

alluvial rainfall3,1%

strong winds3,7%

winter frost5,8%

tornados7.2%

snow excess7,5%

drought9,2%

persistent rainfall0,1%

ADVERSITIES AND COMPENSATED MUNICIPALITIES IN THE PERIOD 1978-2003

Adversitiesn° events

in 26 years

n° compensated

municipalitiesin 26 years

n°events/year

n° compensated

municipalities/year

ITA26

Hailstorm 358 3423 13.8 131.7 9.6

Tornado 67 413 2.6 15.9 6.2

Alluvial rainfall 29 179 1.1 6.9 6.2

Spring and autumn frost 16 90 0.6 3.5 5.6

Violent winds 11 211 0.4 8.1 19.2

Drought 8 529 0.3 20.3 66.1

Landslip 4 91 0.2 3.5 23

Snow excess 3 428 0.1 16.5 142.7

Persistent rainfall3 8 0.1 0.3 2.7

Winter Frost 2 334 0.1 12.8 167

Seastorm 2 23 0.1 0.9 11.5

total 503 5729 19.3 220.3 11.4

EVENTS LASTING SEVERAL DAYS IN THE PERIOD 1978-2003

Adversitiesn°events

1978-2003n°days

1978-2003n°days/event n°days/year

Alluvial rainfall 29 61 2.1 2.3

Spring and autumn frost 16 62 3.9 2.4

Violent winds 11 47 4.3 1.8

Drought 8 929 116.1 35.7

-GRAPEVINE COMPENSATED EVENTS - 1978-2003

adversities n° events Frequency (%)

hailstorm 272 91

tornado 13 4

spring frost 10 3

drought 4 1

alluvial rainfall 3 0.6

winter frost 1 0.0..

28 AUGUST 2003 HAILSTORM EVENT: MUNICIPALITIES INJURED

HAILSTONES SIZES 28 AUGUST 2003

HAILSTORM OVER PADOVA 28 AUGUST 2003

28 AUGUST 2003 HAILSTORM EVENT:COMPENSATED GRAPEVINE VENDIBLE GROSS PRODUCTION

ha POTENTIAL VGP (euro) % DAMAGECOMPENSATION

(euro)

8 MUNICIPALITIES 156 755.689,6 56,4% 426.246,6

UPPER-LEVEL COLD AIR PASSAGE FROM THE NORTH OVER LOW-LEVEL WARM AIR: SET UP OF LARGE INSTABILITY

SURFACE CHART 28 AUGUST

28 AUG 2003 HAILSTORM EVENT:SINOPTYC METEOROLOGICAL SITUATION -

VISIBILE SATELLITE 8 P.M. LOCAL TIME

padova

28 AUG 2003 HAILSTORM EVENT:WHITING STABILITY INDEX

28 AUG 2003 HAILSTORM EVENT:PRESENCE OF A CONVERGENCE LINE AT SURFACE LEVEL

-RADAR IMAGES OF HAILSTORM ON 28 AUG 03-

INTENSE AND HIGH-REACHING CONVECTIVE SYSTEM FAVOURABLE FOR

THE FORMATION OF LARGE SIZE HAILSTONES, (LONG SUSPENSION

PERIOD)

REFLECTIVITY AND VERTICAL PROFILE: 60 dBZ a 7 km height45 dBZ a 12 km di height

FUTURE DEVELOPMENTS

• increase of the territorial scale analysis at “site level”

• description of the relationship between single cultivation phenology and damage, and single atmospheric adversity

• synoptic study of single adversities behavior, supported from remote sensing techniques, especially radar images for

hail

• real-time radar images monitoring, in function of the organization of a nowcasting alert system

• calculation of the “adversity risk” in function of frequency, damage, and event probability to support the elaboration of

insurance policies.