Data Summary    

Data/Results

1. Silver Maple and Crab Apple Budburst Picture Record

Table #1 Silver Maple – MSSD, Washington, DC

Feb 20, 2007	March 13, 2007	April 7, 2007	April 19, 2007	April 24, 2007

Table #2 Silver Maple, ISD, Indianapolis, IN

Feb 26, 2007	March 8, 2007	April 11, 2007	April 13, 2007	April 23, 2007	May 22, 2007

Table #3 Crab Apple – ISD, Indianapolis, IN

Feb. 26, 2007	March 8, 2007	March 28, 2006	April 11, 2007

Table #4 Crab Apple - MSSD, Washington, DC

Feb 20, 2007	March 13, 2007	March 29, 2007	April 7, 2007

2. Phenology Data Summaries

3. Temperature and Precipitation Data Graphs

   Graph # 1 Min/Max/Current Temperature Data (GLOBE) MSSD 2007

   Graph # 2 Min/Max/Current Temperature Data (GLOBE) ISD 2007

           

   Graph # 3 Precipitation Data (GLOBE) MSSD 2007

   Graph # 4 Precipitation Data (GLOBE) ISD 2007

   Graph # 5 Humidity Data (GLOBE) MSSD 2007

   Graph #6 Humidity Data (GLOBE) ISD 2007

           

Discussion of the Data

In Table 1 and 2 budburst pictures show how the Silver Maple’s buds grew for four months as we checked the buds everyday in our schools. The Silver Maple continuously grew new leaves and grew more centimeters each day! By April 24, 2007, there are fully green leaves are all over the Silver Maple in MSSD and at ISD by May 22, 2007. MSSD’s leaves are bigger than ISD’s leaves since MSSD budburst was earlier than ISD. The pictures show how MSSD’s male flowers grew and developed, but did not produce any seeds. For ISD, the pictures show how different the female flowers are and how they grew seeds.

In Table 3 and 4 budburst pictures show how the Crab Apple’s buds were growing faster than the Silver Maple. They grew beautiful flowers, as you can see, and the leaves and flowers burst at the same time, all by March 17 at MSSD and March 24 at ISD. The leaves didn’t stop growing until mid-April. MSSD’s flowers are pink while ISD’s flowers are white. During the early April freezes, the flowers and leaves ISD’s tree were not able to survive the below freezing temperatures, but MSSD’s leaves and flowers were still healthy even though it had snow.

Budburst Data Summary Tables #5 and #6

Comparing MSSD and ISD, for the Crab Apples, we found that in Indiana the buds burst a week later (March 24) than in MSSD (March 17). At MSSD, the Crab Apple required more Growth Degrees (GDS) (425.49) than in ISD (322.95). For the Water Difference (WD), at ISD 76.97 mm of water is similar to MSSD’s 71.63 mm for the Crab Apple,

For the Silver Maples, we found that the leaf buds burst a few days later in Indiana (April 20-22), and MSSD (April 11-19, just 2 or 3 days earlier at MSSD). The Silver Maple at MSSD required a little more GD (740.65 deg) than in ISD (618.66 deg). For the Water Difference, Indiana’s Silver Maple had a slightly larger WD of 48 mm compared to MSSD’s 35.87 mm. After that, in about 3 days most of buds were dead on our tree at MSSD. Leaf buds at MSSD started to swell on March 24 and finally burst on April 11.

Graphs #1-4

The graphs show temperature and precipitation for each school, MSSD and ISD. We compared and contrasted the two schools. In temperatures, there are a lot of differences between MSSD and ISD in January. In ISD’s graphs, it seemed like it was cold in January then warmer later at the end of February. In MSSD, it was warm at the beginning of January (20’s, C) and it was colder in February but not as many below-zero days as in Indiana. Both locations got warmer in March and April. Our two schools were a little similar in March, and both had a late cold spell the first week of April. At ISD, it got a lot colder than at MSSD.

In the rainfall graphs, there are lots of differences for precipitation. We were surprised to see a similar rainfall in the middle of March in Indiana and at MSSD, about 35 mm in D.C. and 65 millimeters in Indiana. Overall, at ISD, there was more rainfall than at MSSD.