Short-term (1998–2006) fluctuations of Pb isotopes at Piton de la Fournaise volcano (Reunion Island): Origins and constraints on the size and shape of the magma reservoir

2007 ◽  
Vol 244 (1-2) ◽  
pp. 202-220 ◽  
Author(s):  
Ivan Vlastélic ◽  
Aline Peltier ◽  
Thomas Staudacher
Keyword(s):  
Magma Reservoir ◽  
Pb Isotopes ◽  
Reunion Island ◽  
Short Term ◽  
Piton De La Fournaise ◽  
Size And Shape ◽  
Réunion Island

scholarly journals Evaluation of WRF-DART (ARW v3.9.1.1 and DART Manhattan release) multiphase cloud water path assimilation for short-term solar irradiance forecasting in a tropical environment

2019 ◽  
Vol 12 (9) ◽  
pp. 3939-3954
Author(s):  
Frederik Kurzrock ◽  
Hannah Nguyen ◽  
Jerome Sauer ◽  
Fabrice Chane Ming ◽  
Sylvain Cros ◽  
...  
Keyword(s):  
Data Assimilation ◽  
Weather Prediction ◽  
Cloud Water ◽  
Specific Humidity ◽  
Reunion Island ◽  
Short Term ◽  
Water Path ◽  
Réunion Island ◽  
Cloud Water Path ◽  
The Impact

Abstract. Numerical weather prediction models tend to underestimate cloud presence and therefore often overestimate global horizontal irradiance (GHI). The assimilation of cloud water path (CWP) retrievals from geostationary satellites using an ensemble Kalman filter (EnKF) led to improved short-term GHI forecasts of the Weather Research and Forecasting (WRF) model in midlatitudes in case studies. An evaluation of the method under tropical conditions and a quantification of this improvement for study periods of more than a few days are still missing. This paper focuses on the assimilation of CWP retrievals in three phases (ice, supercooled, and liquid) in a 6-hourly cycling procedure and on the impact of this method on short-term forecasts of GHI for Réunion Island, a tropical island in the southwest Indian Ocean. The multilayer gridded cloud properties of NASA Langley's Satellite ClOud and Radiation Property retrieval System (SatCORPS) are assimilated using the EnKF of the Data Assimilation Research Testbed (DART) Manhattan release (revision 12002) and the advanced research WRF (ARW) v3.9.1.1. The ability of the method to improve cloud analyses and GHI forecasts is demonstrated, and a comparison using independent radiosoundings shows a reduction of specific humidity bias in the WRF analyses, especially in the low and middle troposphere. Ground-based GHI observations at 12 sites on Réunion Island are used to quantify the impact of CWP DA. Over a total of 44 d during austral summertime, when averaged over all sites, CWP data assimilation has a positive impact on GHI forecasts for all lead times between 5 and 14 h. Root mean square error and mean absolute error are reduced by 4 % and 3 %, respectively.

March 1986 eruptive episodes at Piton de la Fournaise volcano (Reunion Island)

1989 ◽  
Vol 36 (1-3) ◽  
pp. 199-208 ◽  
Author(s):  
H. Delorme ◽  
P. Bachèlery ◽  
P.A. Blum ◽  
J.L. Cheminée ◽  
J.F. Delarue ◽  
...  
Keyword(s):  
Reunion Island ◽  
Piton De La Fournaise ◽  
Réunion Island

scholarly journals Lead isotopes behavior in the fumarolic environment of the Piton de la Fournaise volcano (Réunion Island)

2013 ◽  
Vol 100 ◽  
pp. 297-314 ◽  
Author(s):  
I. Vlastélic ◽  
T. Staudacher ◽  
C. Deniel ◽  
J.L. Devidal ◽  
B. Devouard ◽  
...  
Keyword(s):  
Lead Isotopes ◽  
Reunion Island ◽  
Piton De La Fournaise ◽  
Réunion Island

Can rainfall trigger volcanic eruptions? A mechanical stress model of an active volcano: 'Piton de la Fournaise', Reunion Island

Terra Nova ◽  
2001 ◽  
Vol 13 (1) ◽  
pp. 18-24 ◽  
Author(s):  
S. Violette ◽  
G. de Marsily ◽  
J. P. Carbonnel ◽  
P. Goblet ◽  
E. Ledoux ◽  
...  
Keyword(s):  
Mechanical Stress ◽  
Volcanic Eruptions ◽  
Active Volcano ◽  
Stress Model ◽  
Reunion Island ◽  
Piton De La Fournaise ◽  
Réunion Island
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