Instruments deployed at the Chacaltaya GAW station

Gas concentration  

CO  
CO2 and CH4
CH4 flask sampling
Ozone
Water vapor isotopes #
Hg0 #
SO2
Aerosol size distribution

MPSS* 
NAIS
HTDMA* # 
Aerosol optical properties

Nephelometer*
Aethalometer*
MAAP*
Sun Photometer
LIDAR
Aerosol chemical
compositon 

Hi-Vol Sampler  
PAS
PAS, semi-automated
Q-ACSM* #
Ancillary meteorological variables

AWS 5380m
AWS 5260 m
AWS 5130 m
Other collaborations

GPS
Precipitation isotopic composition
* Instruments connected to the main isokinetic inlet (heated to keep the relative humidity of the sampled air below 90%)
# Instruments of projects currently closed
The instruments are deployed at:

Altitude (m a.s.l.)
Latitude
Longitude
Observatory
5240
16°21.014'S
68º07.886'W
Northwestern ridge 
5380
16º20.817'S
68º07.698'W
The observatory is heated to keep the indoors temperature between 16 and 22 °C. Several fans renew continuously the air inside the instruments' room. The shelter located in the northwestern ridge of Chacaltaya is not heated.
Picture
Side view of the building hosting the instruments in CHC
Picture
Sun photomerter (CIMEL), rain gauges and T/RH shelter in the parking lot. (2023, Credits W.E.C.)
Picture
Shelter/hut in the northwestern ridge of the mountain (2014, Credits C.I.M.R.)
Picture
Routine check of the inlets. The metropolitan area is visible below, in the Altiplano. (214, Credits C.I.M.R.)