Sökning: "summer temperature"

Visar resultat 16 - 20 av 167 avhandlingar innehållade orden summer temperature.

1. 16. Temperature variation in time and space, and its effects on insects

   Författare :Loke von Schmalensee; Philipp Lehmann; Gotthard Karl; Michael Angilletta; Stockholms universitet; []
   Nyckelord :NATURVETENSKAP; NATURAL SCIENCES; temperature variation; thermal performance; insects; Lepidoptera; thermal adaptation; thermal ecology; microclimate; seasonality; zoologisk ekologi; Animal Ecology;

   Sammanfattning : Nature is variable. Unfortunately, compressed representations of this variable world, like averages, are often lossy and insufficient for ecological purposes. This is particularly true for temperature variation, which organisms typically respond to in a nonlinear way. LÄS MER

3. 17. Impacts of climate change on surface hydrology in the source region of the Yellow River

   Författare :Feifei Yuan; Avdelningen för Teknisk vattenresurslära; []
   Nyckelord :TEKNIK OCH TEKNOLOGIER; ENGINEERING AND TECHNOLOGY; Source region of the Yellow River; climate change; summer precipitation; ENSO; teleconnection pattern; sea surface temperature; Xinanjiang model; Rainfall-Runoff process;

   Sammanfattning : The source region of the Yellow River contributes about 35% of the total water yield in the Yellow River basin playing an important role for meeting the downstream water resources requirements. The declining water availability caused by climate change in the source region of the Yellow River is expected to have severe repercussions for the 110 million basin inhabitants in terms of water resources affecting agricultural productivity, municipal, and industrial water supply. LÄS MER

4. 18. Frost modelling and pavement temperatures : summer pavement temperaures and frost modelling

   Författare :Åke Hermansson; Luleå tekniska universitet; []
   Nyckelord :TEKNIK OCH TEKNOLOGIER; ENGINEERING AND TECHNOLOGY; Soil Mechanics; Geoteknik;

   Sammanfattning : Three papers form the present thesis. In paper I a numerical model for calculation of surface temperatures on a highway is presented. The model takes all relevant factors into consideration, i.e. LÄS MER

5. 19. Investigation of Polar Mesosphere Summer Echoes in Northern Scandinavia

   Författare :Victoria Barabash; Umeå universitet; []
   Nyckelord :NATURVETENSKAP; NATURAL SCIENCES; Physics; Polar Mesosphere Summer Echoes; middle atmospheric dynamics; ionospheric disturbances; solar radiation; aerosol; MST radar; planetary waves; noctilucent clouds; Fysik; Physics; Fysik; rymdfysik; Space Physics;

   Sammanfattning : This PhD thesis deals with phenomena which are closely related to the unique thermal structure of the polar summer mesosphere, namely Polar Mesosphere Summer Echoes (PMSE). PMSE are strong radar echoes commonly observed by VHF MST radars from thin layers in the 80-90 km altitude interval at high latitudes during summer. LÄS MER

7. 20. Studies of planetary waves in ozone and temperature fields as observed by the Odin satellite in 2002-2007

   Författare :Alla Belova; Sheila Kirkwood; Andrew Klekociuk; Umeå universitet; []
   Nyckelord :NATURVETENSKAP; NATURAL SCIENCES; middle atmosphere dynamics; planetary waves; 5-day planetary wave; temperature-ozone relationship; Odin satellite; Atmosphere and hydrosphere sciences; Atmosfärs- och hydrosfärsvetenskap;

   Sammanfattning : The results presented in this PhD thesis are mainly based on measurements collected by the advanced sub-mm radiometer (SMR) aboard the Odin satellite in 2002-2007. The primary data are series of temperature and ozone profiles in the middle atmosphere up to 68 km. LÄS MER