Two full seasons and one part season of grape microenvironment data were collected at and near Geneva, NY. The data includes temperature, relative humidity, canopy net radiation., soil moisture, heat flux and temperature. This data is now made available on the web.

1. How was the data collected
2. Known problems in the data sets
3. Download the data

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1. How was the data collected

Map of collection area

Diagram of weather station setup

Canopy weather data collected with a CR10X logger (Campbell Scientific, Logan, UT, 84321-1784) recording at 60 second intervals with hourly summaries. Sensors were placed above the canopy, at canopy height and in the soil (Figure 3.2). Rain was measured with a model TE525 tipping bucket rain gauge (Texas Electronics, Dallas, TX 75235-7309) or equivalent. Wind speed, solar and net radiation were measured at the 3-meter level with a wind sentry (R.M. Young, Traverse City, MI, 49684), Li 200x pyranometer (Li-Cor, Lincoln, NE, 68504) and a Q-7.1 net radiometer (REBS, Seattle, WA, 98115-0152). Net radiation was also collected just below canopy level allowing canopy net radiation to be calculated from the difference of the two heights. Air temperature and relative humidity were measured with a HMP35C sensor (Campbell Scientific, Logan, UT, 84321-1784) 1 meter above the canopy, at the top of the canopy, mid canopy height and at the bottom of the canopy.

The placement of sensors in a grape canopy was studied over a 3-year-period in the Finger Lakes Region of New York State (Figure 3.3). In 1996 and 1997, unpainted Campbell sensors were tested, and in 1998, painted Campbell sensors. In 1996, SWD was measured in Vitis labrusca cv 'Concord' (from 23 August - 18 September) and interspecific hybrid 'Chancellor' (19 September - 7 October) at a site near Geneva, NY. In 1997, SWD was measured on Concord in Branchport, NY (5 May -24 August), Vitis vinifera cv 'Chardonnay' in Geneva (28 August - 14 October), and 'Cabernet Franc' in Romulus, NY (8 May to 8 October). In 1998, SWD was measured on 'Cabernet Franc' in Geneva, NY (May 1 to October 16) and on 'Concord' in Geneva, NY (April 24 to October 14). The unpainted and painted sensors were used with transition thresholds of 150 and 6999 kOhm, respectively.

Sensors were placed in each of five canopy positions corresponding to top, bottom, middle, and the two sides of the vineyard row at middle height. Each position was replicated three times. The orientation of the vineyard rows was north-south, except for the Chardonnay in Geneva which was east-west. The sensors were mounted on stands made of metal tubing and PVC pipe at three different heights, facing north (except for Geneva 1997 when they faced west) and tilted at an angle of 45^o on their short axes. The sensors were checked regularly to make certain that foliage did not come into contact with the sensor surface. In each case, the vines were grown on standard three-wire trellises. The exception was Cabernet Franc which was vertically shoot positioned. Leaf area indices (LAI) were measured with a LI-Cor 2000 canopy analyzer (LiCor, Lincoln, NE, 68504) according to the protocol of Grantz and Williams (1993).
 
2.  Known problems in the data set

1.  Data from 1996 has only a few months
2.  SWD sata from 1996, 1997 used unpainted SWD sensors which are less accurate and less precise.
3.  Cabernet Franc 1998 (Research south, Geneva), rs98 the relarive humidity sensors were not well calibrated during this period
 

3. Download the data
 

Data vailable

1.  Data from New York state
2.  Data from Australia

1.  New York Data
1. Micro-environment data
2. Leaf area index data
3. Wetting period data
 

 Microenvironment data

The microclimate data can be downloaded from this table. nOte the data is *.doc file but it is actually just a tab delimited file change the extension back to *.txt if you encounter problems
Yr	Cultivar	SWD sensor Typea	LAIb	SWD # Events	Month Start	Month End	Dowload)
							Site  Doc	data
96	Concord	UPC	3.9	24	Aug	Sep	lo96	lo96		x
96	Chancellor	UPC	1.6	17	Sep.	Oct	ch96	ch96		x
97	Concord	UPC	2.0	119	Mar.	Sep	de97	de97		x
97	Cab. Franc	UPC	1.0	153	Mar.	Oct	sw97	sw97		x
97	Chardonnay	UPC	1.0	51	Sep.	Oct	gv97	gv97		x
98	Concord	PC	2.2	291	Apr.	Oct.	lo98	lo98		x
98	Cab. Franc	PC	1.8	212	Apr.	Oct.	rs98	rs98		x

^a Type UPC unpainted Campbell SWD sensors, PC painted Campbell Sensors, each sensor was replicated 3 times ; VIS Visual observations - 15 leaves were examined on each of 3 vines
^b Leaf area index.
^c Sides at middle height see Figure 3.2.
^d The mean uncertainty is the average of all canopy positions.
^e The total uncertainty is the uncertainty for the whole vine ignoring canopy position.

The leaf area index data can be downloaded in the form of graphs in a word97 file.
Wetting periods for all these sites are contained in the file grapewet.doc and the 9697lwpfor.docis the  fortran program used to produce them

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2.  Australian data
 
A brief selection of data for Coromandel Valley Australia is included.  It includes two months of data from From february to the foirst week of April.  A 50 kOhm resistence threshold was found to work best for this site.
 

year	Cultivar	SWD sensor	LAI	# SWD events	site doc	site data
98	Cabernet franc	PC		27	aa98	aa98

 
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