A5057752462- Cryospheric studies and observations
- Climate change and permafrost
- Climate variability and models
- Arctic and Antarctic ice dynamics
- Geology and Paleoclimatology Research
- Atmospheric and Environmental Gas Dynamics
- Meteorological Phenomena and Simulations
- Winter Sports Injuries and Performance
- Landslides and related hazards
- Oceanographic and Atmospheric Processes
- Methane Hydrates and Related Phenomena
- Geophysics and Gravity Measurements
- Atmospheric Ozone and Climate
- Advanced Software Engineering Methodologies
- Polar Research and Ecology
- Geological Studies and Exploration
- Coastal and Marine Management
- Mobile Agent-Based Network Management
- Solar and Space Plasma Dynamics
- Advanced Malware Detection Techniques
- Impact of Light on Environment and Health
- Solar Radiation and Photovoltaics
- Radioactive element chemistry and processing
- Hydrology and Watershed Management Studies
- Coastal and Marine Dynamics
University of Lincoln
2016-2024
University of Sheffield
2009-2020
University of Ulster
2007-2010
Core Laboratories (United States)
2010
University of Greenwich
2008
University of Missouri
2005
Nevada System of Higher Education
2005
Desert Research Institute
2005
University of Arizona
2005
University of Plymouth
2001-2003
We combine estimates of the surface mass balance, SMB, Greenland ice sheet for years 1958 to 2007 with measurements temporal variability in discharge, D, deduce total balance. During that time period, we find a robust correlation (R 2 = 0.83) between anomalies SMB and which use reconstruct continuous series was losing 110 ± 70 Gt/yr 1960s, 30 50 or near balance 1970s–1980s, 97 47 1996 increasing rapidly 267 38 2007. Multi‐year variations themselves related cause 60 20% more variation than...
Abstract The authors attribute significantly increased Greenland summer warmth and Ice Sheet melt runoff since 1990 to global warming. Southern coastal Northern Hemisphere temperatures were uncorrelated between the 1960s early 1990s but positively correlated thereafter. This relationship appears have been modulated by North Atlantic Oscillation, whose index was (negatively) with southern until not Significant warming in ∼1990, as also evidenced from Swiss Camp on west flank of ice sheet,...
Repeated laser‐altimeter surveys and modelled snowfall/summer melt show average ice loss from Greenland between 1997 2003 was 80 ± 12 km 3 yr −1 , compared to about 60 for 1993/4–1998/9. Half of the increase higher summer melting, with rest caused by velocities some glaciers exceeding those needed balance upstream snow accumulation. Velocities one large glacier almost doubled 2003, resulting in net its drainage basin 20 2002 2003.
Abstract The potential of recent Arctic changes to influence hemispheric weather is a complex and controversial topic with considerable uncertainty, as time series linkages are short (<10 yr) understanding involves the relative contribution direct forcing by on chaotic climatic system. A way forward through further investigation atmospheric dynamic mechanisms. During several exceptionally warm winters since 2007, sea ice loss in Barents Kara Seas initiated eastward-propagating wave...
Synchronous acceleration and thinning of southeast (SE) Greenland glaciers during the early 2000s was main contributor that resulted in doubling annual discharge from ice sheet. We show this followed by a synchronized widespread slowdown same glaciers, many cases associated with decrease rates, we propose sheet–ocean interactions are first‐order regional control on these recent mass changes. Sea surface temperature mooring data preceding dynamic coincides brief decline cold East Coastal...
ABSTRACT The NASA announcement of record surface melting the Greenland ice sheet in July 2012 led us to examine atmospheric and oceanic climatic anomalies that are likely have contributed these exceptional conditions also ask question how unusual were compared available records. Our analysis allows assess relative contributions two key influences both extreme melt event ongoing climate change. In 2012, as recent warm summers since 2007, a blocking high pressure feature, associated with...
ABSTRACT We present an extended monthly and seasonal Greenland Blocking Index ( GBI ) from January 1851 to December 2015, which more than doubles the length of existing published series. achieve this by homogenizing Twentieth Century Reanalysis version 2c‐based splicing it with NCEP / NCAR Reanalysis‐based . For whole time period, there are significant decreases in autumn, October November, no monthly, or annual increases. More recently, since 1981 increases all seasons annually, strongest...
Seasonal coastal upwelling was analyzed along the NW African coastline (11–35°N) from 1981 to 2012. Upwelling magnitudes are calculated by wind speed indices, sea-surface temperature indices and inferred meteorological station, height vertical water column transport data. A permanent annual regime is documented across 21–35°N a seasonal 12–19°N, in accordance with climatology of previous studies. regions were split into three zones: (1) Mauritania–Senegalese zone (12–19°N), (2) strong...
The last six years (2007–2012) show a persistent change in early summer Arctic wind patterns relative to previous decades. pattern, which has been previously recognized as the Dipole (AD), is characterized by relatively low sea‐level pressure over Siberian with high Beaufort Sea, extending across northern North America and Greenland. Pressure differences peak June. In search for proximate cause newly AD we note that composite 700 hPa geopotential height field during June 2007–2012 exhibits...
Abstract Correlation analysis of Greenland coastal weather station temperatures against the North Atlantic Oscillation (NAO) and Multidecadal (AMO) indices for summer season (when Ice Sheet melt runoff occur) reveals significant temporal variations over last 100 years, with periods strongest correlations in early twentieth century during recent decades. During mid‐twentieth century, temperature changes at stations are not significantly correlated these circulation indices. (GrIS) since 1970s...
Abstract Confidence in projections of global-mean sea level rise (GMSLR) depends on an ability to account for GMSLR during the twentieth century. There are contributions from ocean thermal expansion, mass loss glaciers and ice sheets, groundwater extraction, reservoir impoundment. Progress has been made toward solving “enigma” twentieth-century GMSLR, which is that observed previously found exceed sum estimated contributions, especially earlier decades. The authors propose following:...
Abstract. Since 2007, there has been a series of surface melt records over the Greenland ice sheet (GrIS), continuing trend towards increased observed since end 1990's. The last two decades are characterized by an increase negative phases North Atlantic Oscillation (NAO) favouring warmer and drier summers than normal GrIS. In this context, we use circulation type classification based on daily 500 hPa geopotential height to evaluate role atmospheric dynamics in acceleration for decades. Due...
Abstract. Observations and models agree that the Greenland Ice Sheet (GrIS) surface mass balance (SMB) has decreased since end of 1990s due to an increase in meltwater runoff this trend will accelerate future. However, large uncertainties remain, partly different approaches for modelling GrIS SMB, which have weigh physical complexity or low computing time, spatial temporal resolutions, forcing fields, ice sheet topographies extents, collectively make inter-comparison difficult. Our SMB model...
Abstract We provide an updated analysis of instrumental Greenland monthly temperature data to 2019, focusing mainly on coastal stations but also analysing ice‐sheet records from Swiss Camp and Summit. Significant summer (winter) warming ~1.7 (4.4)°C occurred 1991–2019, since 2001 overall trends are generally flat insignificant due a cooling pattern over the last 6–7 years. Inland show broadly similar for summer. changes more strongly correlated with Blocking than North Atlantic Oscillation...
Abstract Pronounced changes in the Arctic environment add a new potential driver of anomalous weather patterns midlatitudes that affect billions people. Recent studies these Arctic/midlatitude linkages, however, state inconsistent conclusions. A source uncertainty arises from chaotic nature atmosphere. Thermodynamic forcing by rapidly warming contributes to events through changing surface heat fluxes and large-scale temperature pressure gradients. But internal shifts atmospheric dynamics—the...
Satellite radar altimetry measurements indicate that the East Antarctic ice-sheet interior north of 81.6 degrees S increased in mass by 45 +/- 7 billion metric tons per year from 1992 to 2003. Comparisons with contemporaneous meteorological model snowfall estimates suggest gain was associated precipitation. A this magnitude is enough slow sea-level rise 0.12 0.02 millimeters year.
Meteorological models were used to retrieve annual accumulation, runoff, and surface mass balance on a 5 km × grid for the Greenland ice sheet 1958–2003. We present first such history that provides insight into seasonal interannual variability, which should prove useful those studying sheet. Derived runoff was validated by means of control model run independent in situ data. Modeled accumulation has already been using shallow core Surface (SMB) responds rapidly yearly basis changing...