Results 71 to 80 of about 41,183 (323)
Unbiased calculation, evaluation, and calibration of ensemble forecast anomalies
Quarterly Journal of the Royal Meteorological Society, EarlyView.Standard methods for calculating ensemble forecast anomalies result in statistical inconsistencies between forecast and verification anomalies, even if the underlying forecasts are perfectly reliable. An unbiased evaluation of anomaly‐based ensemble forecasts must account for differences in climatological sampling uncertainty between forecasts and ...
Christopher D. Roberts +1 more
wiley +1 more source
A Synoptic Analysis of Cyclonic Activity During 1961-2003 [PDF]
مخاطرات محیط طبیعی, 2012 Mid-latitude cyclones play an important role in precipitation over Iran. A survey on 6-hourly geopotential height of 1000 hPa level showed that the number of cyclones in the studied area reveals a positive trend.
Seyyed Abolfazl Masoodian
doaj +1 more source
Weighted composite analysis and its application: an example using ENSO and geopotential height
, 2017 The arbitrariness of composite analysis due to criterion of defining positive and negative events is an unsolved problem. To deal with it, a new method based on the covariance and defined as weighted composite analysis was developed in this study.
Zhiang Xie, A. Duan, Qun Tian
semanticscholar +1 more source
How tropical Pacific surface cooling contributed to accelerated sea ice melt from 2007 to 2012 as ice is thinned by anthropogenic forcing [PDF]
, 2019 Over the past 40 years the Arctic sea ice minimum in September has declined. The period between 2007 and 2012 showed accelerated melt contributed to the record minima of 2007 and 2012.
Baxter, Ian
core
Quarterly Journal of the Royal Meteorological Society, EarlyView.An original method is applied to identify distinct periods of observed NAO spatial patterns, evaluating the ability of state‐of‐the‐art climate models to reproduce them. Their poor representation of this multidecadal variability increases uncertainty in winter precipitation projections for Europe and likely broad regions of the Northern Hemisphere ...
A. Halifa‐Marín +6 more
wiley +1 more source
EVALUATION OF RECENT GLOBAL GEOPOTENTIAL MODELS BY GNSS/LEVELLING DATA: INTERNAL AEGEAN REGION
, 2016 Global geopotential models of spherical harmonic coefficients are used to determine the external gravitational field of the Earth. These coefficients are derived from satellite orbit perturbations, terrestrial gravity anomalies and altimeter data ...
M. Yilmaz +3 more
semanticscholar +1 more source
The applicability of the T/S method to geopotential anomaly computations in the Northeast Atlantic [PDF]
, 1983 Methods are tested for computing geopotential anomalies from temperature data in the subtropical Northeast Atlantic. Mean temperature-salinity, salinity-depth and density-depth relationships are determined for 3 x 3° squares, using hydrographie data ...
Siedler, Gerold, Stramma, Lothar
core
, 2005 In this paper we will show in detail that the performed attempts aimed at the detection of the general relativistic Lense-Thirring effect in the gravitational field of the Earth with the existing LAGEOS satellites are often presented in an optimistic and
Allison +53 more
core +1 more source
Rapid versus slow intensification of idealized tropical cyclones using soundings from reanalysis
Quarterly Journal of the Royal Meteorological Society, EarlyView.Climatologically averaged environmental wind and moisture around intensifying tropical cyclones are used in an idealized model to further discriminate differences between ensembles of rapidly (RI) and slowly (SI) intensifying storms. On average, RI storms have lower vertical tilt, are more axisymmetric, and less ventilated at onset than SI storms, and ...
Samantha Nebylitsa +3 more
wiley +1 more source
Large-scale circulation features associated with the heat wave over Northeast China in summer 2018
Atmospheric and Oceanic Science Letters, 2019 In late July and early August 2018, Northeast China suffered from extremely high temperatures, with the maxium temperature anomaly exceeding 6°C. In this study, the large-scale circulation features associated with this heat wave over Northeast China are ...
Panhong TAO, Yaocun ZHANG
doaj +1 more source