2005: Very dry, warm and sunny

“Last year it wasn’t that bad.”

A newspaper article with this headline was written in the Göttinger Tageblatt on January 5th, 2006. In this article, our data from the weatherstation Böttingerstraße 17 at FKG is written in red colour, to show the difference between the weatherstation DWD (Geismar south) and our weatherstation (near center, see the map). The distance between both stations is about 3,3km (airline), and are both in an equal height. (DWD 168 meters over sealevel; FKG 150meters over sealevel).

 Of course we haven’t any certified measures, but we think that the precision of measurement of our sensors is enough to make a comparison with other stations.

                                                                                                                 Our Weatherstation

                                                                                                          Weatherstation (DWD)

Now, here’s the article:

How was the weather like last year?  Many people thought it was sunnier and drier over-all.
Göttingen
(bib).

In 2005 the sun shined about 1700 hours – that is 278 sunhours more than average. And that, so Matthias Hans, leader of the weatherstation from the DWD ( German weatherservice) in Geismar, believes can be attributed to the specially warm autumn. The year wasn’t only sunny, it was dry, too. Normally it rains 645 litres/square meters. In 2005 it rained only 585 (638.3) liters. And that’s not enough: It was warmer than average as well. The long resource temperatures - ascertained from 1961 to 1990 – rests by 8.7 degrees. In 2005 it rests ,as annexed the DWD, at 9.2 (10.41) degrees(2004:9.0(10.18) degrees).

The year in months:

January: Extremely mild and too wet: The resource monthly air temperature averages were 2.9(3,4) degrees (normally: 0.3). The most prominent day for weather was January 12th with a maximum temperature from 12.2 (12.9) degrees. It rained 76.3(59.04) liters per square meter -- 160(120.5) percent from the overall condensation. On Jan. 20th, the years first thunderstorm was recorded, and snow covered the ground.

February: The first from altogether four (two) too cold months. With minus 0.3(0.39) degrees, February rests under the overall resource from 1.0 degrees. The DWD detected the coldest day of the year on Februar 28th with minus 17,2 (-15.3). Condensation and sunshine nearly hit the month’s averages.

March: With 124 sunhours, spring was coming: That was 20 hours more than usual. On the 31st  March, the sun shined 11 hours and 54 minutes in Göttingen. The average monthly temperature was 4.6(5,7), 0.5 degrees higher than the 30-year average. On March 16 it was very warm, (5,7) degrees.  Overall rainfall was  27,2 (29.5) liters less than normal (46.7 liters).

April: Very friendly and warmer than normal. The average temperature was 9,3 (10.9) degrees, a 1,3 (2.86) degrees warmer difference. The  sun shined very often: about 180 hours. April was a bit too dry as it rained only 34,3 (30.6) liters.


May: „Cranky“, calls Hans the month. It was 0.4 degrees too cold
(0.2 degrees too warm!!!) and too wet. On the May 19th, the last frost was recorded for the season at 1.1 degrees (we didn’t have frost anymore: min. 1.3 degrees ).  Nine days later, on the 28th, it was a very special 31,5 (29.1) degrees, which was a new record for the 28th of May in Göttingen.


Juni: With an average of 15,1
(17.12) degrees, it was 0,6 degrees (1.6 degrees too warm) too cold. June was also dry as there was only 49,5 (74.16) liters of rain (condensation by us in average.).There is only one(two) “hot day” ,the 21st  was the hottest day of the month with 30.7 (32.2) degrees. A hailstorm in the north of Göttingen occurred on this day in the evening. No wonder it was so dry... the sun shone up to 28 percent more than normal: about 238 hours total.


July: July was the warmest summer month with 17,9
(19.4) degrees. Otherwise, simply sunshine and rain. The hottest day of the year was the July 28th with a sorching temperature of 31,9 (32.6) degrees.

 
August: August is definitely responsible for the bad summer, because the sun shone 24 hours less than normal, and the average temperature (15,9 degrees
(17.1)) was lower, too. But the farmers were happy because a bit more rain fell than the previous months (63 (79.6) liters).

 September: Letterpress weather with more than 30 (31.5 at the 1st september) degrees. September 2005 was clearly too warm (avg. 15,1 (16.4) instead of 13,5 degrees). The sun shined very often( 212 hours–a plus from 61%).And: It rains less (a bit more than normal).


Oktober: The good weather goes on: October is also too warm. The average temperature was 11,1
(12.4) degrees, which beats the normal account by 1,6 (2.9)degrees. The sun shined 178 hours -- 66 hours more than normal. Only 81 percent from the average 39,7 liters of rain fell. On the 28th, the thermometer showed again a high temperature of over 21 (22.3) degrees.
November: The ultimate month was an average 5,2
(6.1) instead of the normal 4,7 degrees too warm. There was again too less condensation and the sun shone with 63 hours too often.As of the 25th there was a snow cover.


December: The year ends with a too dry and too warm month. But the sun shone only 27 hours instead of the normal 34 hours. With a wind speed with 86.4
(89.9) km/h it’s the windiest month of the year, so the DWD.

 

By comparing both weather stations we recognized the following facts…

The year in a review:

In the year 2005 the rainfall in the city center was much higher than in Geismar (53,3 Liters/ ~7 buckets more!!!). The mean annual temperature of our station was about 1,21° Kelvin higher as the DWD station’s temperature. In 2004 our station near the city center also was more than 1° Kelvin warmer. In general the absolute wind forces just varied a little.


Concerning the seasons:

Autumn & Winter: Regarding the winter months there’s a huge difference between the two stations (Geismar/city center). While there were four „too cold“ months in Geismar, there were just two of them noticed by our weather station near the city station. And also the rainfall values differ; in January the DWD measured 73,3 liters, while our station just measured about 59,0 liters of rain. December is the fourth „too cold“ month in a row. The maximum wind force displayed another interesting fact: On December 16th, the DWD measured a 86,4 km/h windspeed which formed the highest squall of the year and was even overbidden by our station which measured 89,9 km/h.

Spring & Summer:  The last frost in the air in Geismar took place on 19th of May (-1,1°C), while the last frost in the air near the city center already appeared in April. During April our station measured values which were only 28,8% more dry than the mean value, while the values in Geismar were much higher (39%). In June the difference of the rainfall-sum amounted even 24,66 liters! With regard to the average temperature June is noticeable: It was about 2° Kelvin warmer than in the area south of Geismar. The 28th of July was the hottest day in the year. We measured 31,9° Kelvin near Geismar while our station even measured 32,6° Kelvin.

 

Explanations:

One can explain the demonstrated measurement differences due to the different weather situations occurring at the two weather stations.  Our measurement instruments near the Göttingen center experience a distinct different climatic situation. The exponent lies in the Geismar Feldmark with nightly cold air streams.  The difference in precipitation measurements, mainly in Summer and Spring, can be traced back to the local course of events.  It comes through considerable variation between the two stations in the total precipitation sums of the individual months.  The temperatures – especially the maximums and minimums – demonstrate a distinct postive thermal stream in the areas due to the environmental temperature by our weather station.  Our weather station also experiences cold air streams from gentle high pressure systems, although they are not so strongly developed.  Astoundingly, the wind speeds from both stations are of similar values.  An explanation  is offered by the situation of our wind measuring tools.  One finds himself approximately 25m higher than the surroundings on the FKG tower.  Consequently the “throatiness” of the city is linked to the height of the location, and similar values can be measured 10m high in the field of Giesmar Feldmark.

 

Jago und Marcel (9f)

Translated by: Baran, Gi-Mun, Lisa, Lisa ( 9f )

Revised and further translated by: Emily, 12te Stufe