[1] Submicron atmospheric aerosol particles were collected between 1 March 2008 and 1 March 2009 at Barrow, Alaska, to characterize the organic mass (OM) in the Arctic aerosol. Organic functional group concentrations and trace metals were measured with FTIR on submicron particles collected on Teflon filters. The OM varied from 0.07 mg m in summer to 0.43 mg m in winter, and 0.35 mg m in spring,...

The regulation of the majority of cold-regulated genes in plants is mediated by CBF (C-repeat binding factors) transcription factor family. Natural differences in frost tolerance (FT) of wheat have been mapped to the Fr-2 (Frost Resistance-2) locus on chromosome group 5 and are associated with variation in threshold induction temperatures and/or transcript levels of CBF genes. This study used r...

One of the reasons limiting apricot expansion in world is short period winter dormancy plants and rapid development generative buds spring. Apricot flower often die even after small spring return frosts that limit commercial culture this fruit crop. The aim investigation was to study collection-breeding plantations select frost-resistant genotypes have promise for breeding use. To solve problem...

Germination in Sugar Beets R. R. WOOD Introduction The development of varieties of sugar beets capable of germination from seed at low temperatures, together with the ability to withstand frost after establishment of the plant in spring and resistance to early freezing damage in fall, now appears to be entirely possible. The apparent advantages of such types in temperate climaxes is fairly obvi...

Agriculture and forestry are two economic sectors most dependent on climate, climate change has a direct indirect impact biotic abiotic disturbances with strong implications. The air temperature is one of the major environmental factors affecting growth, development, yields crops. Despite undeniable global warming, damage to crops by frost freezing temperatures causes serious loss farmers in ma...

Acacia constricta, "WHITETHORN ACACIA" Drought tolerant, deciduous, Southwest native small tree or large shrub w/ spiny branches & tiny, feathery leaves; flowers are fragrant, yellow bottlebrushes produced summer. [7] (H*W*S*) Acacia greggii, "CATCLAW ACACIA" Drought tolerant, deciduous small tree/large shrub w/ spiny branches & tiny, ferny leaves; flowers are fragrant, creamy yellow bottle-bru...

Meso-scale constitutive models of frost-damaged concrete are developed in this study through numerical simulation using a two-dimensional Rigid Body Spring Model (RBSM). The aim of the simulation is to predict the macro behavior of frost-damaged concrete subjected to mechanical loading. The models also clarify the difference in failure behavior of concrete with and without frost damage. Zero st...

mashhad plain is one of the most important regions of apple cultivated areas. occurring spring late frost creates a lot of damages on bud and decreasing the yield of apple in this region. assessment and risk modeling of frost damage would be useful to manage and decrease the damage. the study area is a part of khorasan razavi province which is located in mashhad plain. this region is located in...

This study presents an updated assessment of the projected climate change over Greece in near future (2021–2050) and at end 21st century (2071–2100) (EOC), relative to reference period 1971–2000, focusing on seasonal crop-specific climatic indices. The indices include days (d) with: a maximum daily near-surface temperature (TASMAX) > 30 °C Spring, TASMAX 35 Summer (hot days), minimum (TASMIN...