diff --git a/adamont/download_adamont.py b/adamont/download_adamont.py
new file mode 100644
index 0000000000000000000000000000000000000000..55f7b857789f1b3a9bd73eb3bd4083dae2e80f94
--- /dev/null
+++ b/adamont/download_adamont.py
@@ -0,0 +1,22 @@
+import subprocess
+
+requests = """https://climatedata.umr-cnrm.fr/public/dcsc/projects/DRIAS/ADAMONT2017/Alpes/CNRM-CM5/ALADIN53/historical/day/snowswe/SNOWSWE_PRO_CNRM-ALADIN53_CNRM-CERFACS-CNRM-CM5_HISTO_alp_1950080106_2005073106_6h.nc
+https://climatedata.umr-cnrm.fr/public/dcsc/projects/DRIAS/ADAMONT2017/Alpes/IPSL-CM5A/WRF331F/historical/day/snowswe/SNOWSWE_PRO_IPSL-INERIS-WRF331F_IPSL-IPSL-CM5A-MR_HISTO_alp_1951080106_2005073106_6h.nc
+https://climatedata.umr-cnrm.fr/public/dcsc/projects/DRIAS/ADAMONT2017/Alpes/CNRM-CM5/RCA4/historical/day/snowswe/SNOWSWE_PRO_SMHI-RCA4_CNRM-CERFACS-CNRM-CM5_HISTO_alp_1970080106_2005073106_6h.nc
+https://climatedata.umr-cnrm.fr/public/dcsc/projects/DRIAS/ADAMONT2017/Alpes/EC-EARTH/RCA4/historical/day/snowswe/SNOWSWE_PRO_SMHI-RCA4_ICHEC-EC-EARTH_HISTO_alp_1970080106_2005073106_6h.nc
+https://climatedata.umr-cnrm.fr/public/dcsc/projects/DRIAS/ADAMONT2017/Alpes/MOHC-HadGEM2/RCA4/historical/day/snowswe/SNOWSWE_PRO_SMHI-RCA4_MOHC-HadGEM2-ES_HISTO_alp_1981080106_2005073106_6h.nc
+https://climatedata.umr-cnrm.fr/public/dcsc/projects/DRIAS/ADAMONT2017/Alpes/IPSL-CM5A/RCA4/historical/day/snowswe/SNOWSWE_PRO_SMHI-RCA4_IPSL-IPSL-CM5A-MR_HISTO_alp_1970080106_2005073106_6h.nc
+https://climatedata.umr-cnrm.fr/public/dcsc/projects/DRIAS/ADAMONT2017/Alpes/MPI-ESM-LR/RCA4/historical/day/snowswe/SNOWSWE_PRO_SMHI-RCA4_MPI-M-MPI-ESM-LR_HISTO_alp_1970080106_2005073106_6h.nc
+https://climatedata.umr-cnrm.fr/public/dcsc/projects/DRIAS/ADAMONT2017/Alpes/MOHC-HadGEM2/RACMO22E/historical/day/snowswe/SNOWSWE_PRO_KNMI-RACMO22E_MOHC-HadGEM2-ES_HISTO_alp_1981080106_2005073106_6h.nc
+https://climatedata.umr-cnrm.fr/public/dcsc/projects/DRIAS/ADAMONT2017/Alpes/CNRM-CM5/CCLM4-8-17/historical/day/snowswe/SNOWSWE_PRO_CLMcom-CCLM4-8-17_CNRM-CERFACS-CNRM-CM5_HISTO_alp_1950080106_2005073106_6h.nc
+https://climatedata.umr-cnrm.fr/public/dcsc/projects/DRIAS/ADAMONT2017/Alpes/EC-EARTH/CCLM4-8-17/historical/day/snowswe/SNOWSWE_PRO_CLMcom-CCLM4-8-17_ICHEC-EC-EARTH_HISTO_alp_1950080106_2005073106_6h.nc
+https://climatedata.umr-cnrm.fr/public/dcsc/projects/DRIAS/ADAMONT2017/Alpes/MOHC-HadGEM2/CCLM4-8-17/historical/day/snowswe/SNOWSWE_PRO_CLMcom-CCLM4-8-17_MOHC-HadGEM2-ES_HISTO_alp_1981080106_2005073106_6h.nc
+https://climatedata.umr-cnrm.fr/public/dcsc/projects/DRIAS/ADAMONT2017/Alpes/MPI-ESM-LR/CCLM4-8-17/historical/day/snowswe/SNOWSWE_PRO_CLMcom-CCLM4-8-17_MPI-M-MPI-ESM-LR_HISTO_alp_1950080106_2005073106_6h.nc
+https://climatedata.umr-cnrm.fr/public/dcsc/projects/DRIAS/ADAMONT2017/Alpes/MPI-ESM-LR/REMO019/historical/day/snowswe/SNOWSWE_PRO_MPI-CSC-REMO2009_MPI-M-MPI-ESM-LR_HISTO_alp_1950080106_2005073106_6h.nc
+https://climatedata.umr-cnrm.fr/public/dcsc/projects/DRIAS/ADAMONT2017/Alpes/NorESM1/HIRHAM5/historical/day/snowswe/SNOWSWE_PRO_DMI-HIRHAM5_NCC-NorESM1-M_HISTO_alp_1951080106_2005073106_6h.nc
+"""
+
+for request in requests.split('\n')[:]:
+    command_line = 'wget {}'.format(request)
+    print(command_line)
+    subprocess.run(command_line, shell=True)
\ No newline at end of file
diff --git a/adamont/ensemble_simulation.py b/adamont/ensemble_simulation.py
new file mode 100644
index 0000000000000000000000000000000000000000..ea80242c9eb8b12d0209cdd324195da6d7c0bfd9
--- /dev/null
+++ b/adamont/ensemble_simulation.py
@@ -0,0 +1,65 @@
+import os
+from typing import List
+import os.path as op
+
+from cached_property import cached_property
+
+from adamont.single_simulation import SingleSimulation
+
+ADAMONT_PATH = r"/home/erwan/Documents/projects/spatiotemporalextremes/local/spatio_temporal_datasets/ADAMONT"
+
+
+class EnsembleSimulation(object):
+
+    def __init__(self, scenario='HISTO', parameter='SNOWSWE',
+                 first_winter_required_for_histo=1958, last_winter_for_histo=2004):
+        self.scenario = scenario
+        self.parameter = parameter
+        self.first_winter_required_for_histo = first_winter_required_for_histo
+        self.last_year_for_histo = last_winter_for_histo
+
+        # Assert value for the parameter
+        assert scenario in ['HISTO', 'RCP45']
+        assert parameter in ['SNOWSWE']
+        assert first_winter_required_for_histo >= 1950
+        assert first_winter_required_for_histo <= 2004
+
+        # Load simulations
+        self.simulations = [SingleSimulation(op.join(ADAMONT_PATH, nc_file)) for nc_file in self.nc_files]
+
+    """Ce problème affecte toutes lessimulations HISTORIQUE CORDEX réalisées en utilisant le forçage CNRM-CM5: CCLM4-8-17: ALADIN53 et RCA4"""
+
+    @cached_property
+    def simulations_path(self):
+        return op.join(ADAMONT_PATH, self.parameter, self.scenario)
+
+    @cached_property
+    def nc_files(self) -> List[str]:
+        nc_files = []
+        for file in os.listdir(self.simulations_path):
+            first_year = int(file.split('_')[-3][:4])
+            if first_year <= self.first_winter_required_for_histo:
+                # Also remove the historical simulations that contain "CNRM-CM5"
+                # Problem reported in "limitations" on their website
+                # Ce problème affecte toutes lessimulations HISTORIQUE CORDEX
+                # réalisées en utilisant le forçage CNRM-CM5: CCLM4-8-17: ALADIN53 et RCA4
+                if self.scenario == 'HISTO' and 'CNRM-CM5' in file:
+                    print('here', file)
+                    continue
+                nc_files.append(file)
+        assert len(nc_files) > 0
+        return nc_files
+
+    @cached_property
+    def simulations_names(self):
+        return [' + '.join(file.split('_')[2:-5]) for file in self.nc_files]
+
+    def massif_name_and_altitude_to_mean_return_level(self):
+        return {}
+
+
+
+if __name__ == '__main__':
+    ensemble = EnsembleSimulation(first_winter_required_for_histo=1985)
+    print(len(ensemble.simulations))
+    print(ensemble.simulations_names)
diff --git a/adamont/single_simulation.py b/adamont/single_simulation.py
new file mode 100644
index 0000000000000000000000000000000000000000..ab588f32a78f536aafbb0ed205fb522e37577497
--- /dev/null
+++ b/adamont/single_simulation.py
@@ -0,0 +1,19 @@
+from cached_property import cached_property
+from netCDF4._netCDF4 import Dataset
+
+
+class SingleSimulation(object):
+
+    def __init__(self, nc_path):
+        self.nc_path = nc_path
+
+    @cached_property
+    def dataset(self):
+        return Dataset(self.nc_path)
+
+
+
+    def massif_name_and_altitude_to_return_level(self):
+        return {}
+
+