lohr viti event aug 2010 v5 - precision...

Vineyard Microclimates:

What’s your ripening curve?

VITICISIONGet a Grape’s-Eye View

Copyright 2010 © Precision Viticulture International LLC (dba VITICISION). All rights reserved.

J. Lohr Vineyards & Wines

Project Goals:

To measure Cabernet

Sauvignon microclimates.

Find sunburn probability in

different row directions and different row directions and

trellis types.

Assess canopy management

practices.

Relate grape temperatures

to wine quality.


Grape Maturity

Grape composition

and quality

�Water

�Sugars

�Acids

�Nitrogen

Coombe, B.G., McCarthy, M.G. (2000) “Dynamics of grape berry

growth and physiology of ripening,” Australian Journal of Grape

& Wine Research 6: 131-135.

�Nitrogen

compounds and

mineral nutrients

�Phenolics

�Lipids and Volatiles


Sources of variation.

�Light

�Temperature

�Water status

�Nutrient status

How you manage Light

and Temperature.

Quantify the effects of:

�Row direction

�Trellis design & retrofit

Grape Quality

�Nutrient status

�Crop load

�Trellis design & retrofit

�Variety & clone

�Canopy management

�Frost protection

�Climate change

�Cooling trials

�Hail protection


12 33 68 82 108 155 141 277

397 542

664

782

13

24

37

46

66

0

100

200

300

400

500

600

700

800

900

1,000

Tota

l H

ou

rsNE Side of Trellis- Accumulated Hours

95-112 NE

50-95 NE

0-50 NE

69

Ripening Curve

12 33 68 82 0

Aug 30 Sept 6 Sept 13 Sept 20 Sept 27 Oct 4

12 33 68 82 109 158138272

386526

642755

18

31

50

64

89

0

100

200

300

400

500

600

700

800

900

1,000

Aug 30 Sept 6 Sept 13 Sept 20 Sept 27 Oct 4

Tota

l H

ou

rs

SW Side of Trellis- Accumulated Hours

95-112 SW

50-95 SW

0-50 SW

95


Macroclimate: 1000 - 20 km

Global Circulation, Synoptic Meteorology

Mesoclimate: 20 – 0.5 km

Coastal-Inland, Edna Valley, Paso Robles

(East vs. West sides)

Climate and Viticulture

(East vs. West sides)

Topoclimate: 0.5 km - 10 m

solar radiation, relative elevation

N-S slopes, frost pockets

Microclimate: 100 m – 1 cm

vegetation canopies


Paso Daily Climate 1901 to 2005


Precipitation July-June


Mean Temperature April-October


Maximum Temperature April-October


Minimum Temperature April-October


Long Term Frequencies Monthly Tmax:

Paso Robles 1951-2008

0.5

0.6

0.7

0.8

0.9

1.0

Cum Prob

0.5

0.6

0.7

0.8

0.9

1.0

Cum Prob

August September

0.1

0.2

0.3

0.4

0.5

Cum Prob

98 100 102 104 106 108 110 112

8

0.1

0.2

0.3

0.4

0.5

Cum Prob

90 95 100 105 110

9

102°F = 50th percentile



107°F = 80th percentileCopyright 2010 © Precision Viticulture International LLC (dba VITICISION). All rights reserved.

Grapes Eye View ModelMicroclimate: Grape Temperature

Air temperature


How we collect microclimate data

Thermochron Sensors:

Measure hourly grape

temperatures on both

sides of the trellis.

Sensor

sides of the trellis.


How we collect microclimate data

Hemispherical Photos:

Measure canopy light

environment on both

sides of the trellis.sides of the trellis.


Solar Radiation

Sep21

Aug 21

Jul 21

Jun 21

3 pm

6 am6 pm

SunsetSunrise

Oct 21

Sep21

12pm

3 pm9 am


Hilltop (E-W Rows)

Hour

Jul Aug Sep Oct Max

0

200

400

600

800

1000

0 3 6 9 12 15 18 21 24

w/m

2

Hour

Hilltop South

0

200

400

600

800

1000

0 3 6 9 12 15 18 21 24

w/m

2

Hour

Hilltop NorthSouth Side North Side


Pleasant Valley Ranch (N-S Rows)

0

200

400

600

800

1000

0 3 6 9 12 15 18 21 24

w/m

2

Hour

PR12 East

0

200

400

600

800

1000

0 3 6 9 12 15 18 21 24

w/m

2

Hour

PR12 West

Hour

Jul Aug Sep Oct Max

East Side West Side


40

50

60

70

80

90

100

110

120

0 3 6 9 12 15 18 21 24

degF

Hour

Average Hourly Temperatures PR12 Grapes

Canopy_Air

E-grapes

W-grapes

JLohr_Air

40

50

60

70

80

90

100

110

120

0 3 6 9 12 15 18 21 24

degF

Hour

Average Hourly Temperature Hilltop Grapes

Canopy_Air

N-grapes

S-grapes

Air-JLohr

Grape Temperatures

HourHour

40

50

60

70

80

90

100

110

120

0 3 6 9 12 15 18 21 24

degF

Hour

Heatwave Sep 26 PR12 Grapes

Canopy_Air

E-grapes

W-grapes

JLohr_Air

40

50

60

70

80

90

100

110

120

0 3 6 9 12 15 18 21 24

degF

Hour

Heatwave Sep 26 Hilltop Grapes

Canopy_Air

N-grapes

S-grapes

Jlohr-Air


Grape Temperature and Row Direction

PR-12 PR12-W PR12-E PR12-Canopy J. Lohr Air

DH105 149 8 117 6

DH100 463 198 442 133

DH95 958 664 914 478

Hilltop HT-S HT-N HT-Canopy J. Lohr Air

DH105 169 9 45 6

DH100 538 142 271 133

DH95 1132 490 709 478

DH95 958 664 914 478


Hour

Jul Aug Sep Oct Max

600

800

1000w/m

2

DC 303 SE VSP

0

200

400

600

800

1000

0 3 6 9 12 15 18 21 24

w/m

2

Hour

DC 303 NW VSP

0

200

400

600

0 3 6 9 12 15 18 21 24

w/m

Hour

Degree Hours Jul 31 to Oct 11

314-NE

314-

SW

314-

Canopy303-NW 303-SE

303-

Canopy

Air

Oakville

DH105 0 34 20 3 7 16 0

DH100 41 210 162 58 64 102 7

DH95 268 612 502 336 326 416 113


J. Lohr Results

• Sprawl is a good

adaptation to the Paso

climate.

•100 degrees seemed to be

a threshold for Cabernet a threshold for Cabernet

quality measures.

•Canopy Mgmt. Trials 2010:

- 2 Cane lower wire (control)

- 2 Cane upper wire

- 4 cane, all fruit removed

from bottom


A special thanks to:

J. Lohr Vineyards & Wines

Central Coast Vineyard Team

Paso Robles Wine Alliance

VITICISIONVITICISIONGET A GRAPE’SGET A GRAPE’S--EYE EYE VIEWVIEW

PHONE: (650) 270PHONE: (650) 270--98619861EE--MAIL: [email protected]: [email protected]

www.Viticision.comCopyright 2010 © Precision Viticulture International LLC (dba VITICISION). All rights reserved.

lohr viti event aug 2010 v5 - precision...

Documents