Results 81 to 90 of about 7,958 (231)
Concentrations and snow-atmosphere fluxes of reactive nitrogen at Summit, Greenland [PDF]
, 1999 Concentrations and fluxes of NOy (total reactive nitrogen), ozone concentrations and fluxes of sensible heat, water vapor, and momentum were measured from May 1 to July 20, 1995 at Summit, Greenland. Median NOy concentrations declined from 947 ppt in May
Colman, A S +4 more
core +2 more sources
New Phytologist, Volume 249, Issue 6, Page 3091-3103, March 2026.Summary Temperature influences the distribution and performance of both plants and insect herbivores. Consequently, plant–herbivore interactions are likely to vary across thermal gradients, which could affect the evolution of plant defense. Furthermore, temperature fluctuations may elicit immediate changes in defense.
Thomas Dorey +5 more
wiley +1 more source
Hot water drilling in the firn layer of Greenland's percolation zone
Annals of Glaciology, 2021 The intermixed thermal and structural framework of cold firn, water-saturated firn and ice layers in Greenland's percolation zone can be challenging to penetrate with core drills.
Neil Humphrey +2 more
doaj +1 more source
Radioglaciological studies on Hurd Peninsula glaciers, Livingston Island, Antarctica [PDF]
, 2009 We present the results of several radio-echo sounding surveys carried out on Johnsons and Hurd Glaciers, Livingston Island, Antarctica, between the 1999/2000 and 2004/05 austral summer campaigns, which included both radar profiling and common-midpoint ...
Ahlstrom, L.P. +6 more
core +2 more sources
Plant, Cell &Environment, Volume 49, Issue 3, Page 1712-1727, March 2026.ABSTRACT Gene pyramiding in crop varieties offers a promising strategy to achieve sustainable production and reduce reliance on pesticides. However, stacking resistance genes without understanding their biological functions may result in transient protection.
Romane Lapous +6 more
wiley +1 more source
Air reverse circulation at the hole bottom in ice-core drilling
Journal of Glaciology, 2019 Ice-core drilling to depths of 200–300 m is an important part of research studies concerned with paleoclimate reconstruction and anthropogenic climate change. However, conventional drilling methods face difficulties due to firn permeability.
ZHENGYI HU +7 more
doaj +1 more source
Global perspective of nitrate flux in ice cores [PDF]
, 1995 The relationships between the concentration and the flux of chemical species (Cl-, NO3 - , SO42-, Na +, K + , NH4 + , Mg 2+ , Ca 2+) versus snow accumulation rate were examined at GISP2 and 20D in Greenland, Mount Logan from the St.
Dibb, Jack E. +7 more
core +3 more sources
Geophysical Research Letters, Volume 53, Issue 4, 28 February 2026.Abstract Snow dampens sounds, but anecdotal reports concisely describe audible propagating collapse events—firnquakes—in Antarctic and Arctic snowfields. We propose combining granular and continuum mechanics to form a testable theory for conditioning, triggering, and propagation of firnquakes consistent with scarce data.
A. Voigtländer, B. Gee
wiley +1 more source
Formation and development of supraglacial lakes in the percolation zone of the Greenland ice sheet
Journal of Glaciology, 2017 We examine repeat surface altimetry and radio echo observations of two supraglacial lakes in the percolation zone of the Greenland ice sheet to investigate the changes in firn conditions leading to lake formation and implications for meltwater storage ...
CHRISTINE CHEN +2 more
doaj +1 more source
Journal of Geophysical Research: Atmospheres, Volume 131, Issue 4, 28 February 2026.Abstract Nitrogen stable isotopes (δ15N) of ice core nitrate (NO3−) are often subject to diverse interpretations associated with changes in nitrogen oxide (NOx) sourcing, atmospheric reactions, and/or post‐depositional processes. Here, an ice core from Mont Blanc (French Alps) was analyzed to investigate the δ15N(NO3−) record over the past 1,000 years.
Alexis Lamothe +11 more
wiley +1 more source