Description:
Goals:
This experiment was performed to assess the reactive uptake behavior of trans beta-IEPOX that was synthesized for the experiment. Different particle inorganic compositions (mainly ammonium sulfate or AS) and different particle water content were investigated. Particles are injected into the chamber as deliquesced droplets (through a wet wall denuder) and they stabilize to their equilibrium particle liquid water content depending on their hygroscopicity.
Summary:
Large organic aerosol (OA…
Dataset ID:
d789555
Description:
These data are from a special cooperative agreement between the National Science Foundation and the People's Republic of China to make observations in Tibet during the First GARP Global Experiment (FGGE) in 1979.
Dataset ID:
d514000
Description:
Goals:
Measure SOA yield of D5
Summary:
Performed in the Caltech Near Bag, initial NO of 84 ppb, used CH3NO2 (all others used H2O2)
Organization: Caltech Atmospheric Chamber
Lab Affiliation: California Institute of Technology, Pasadena, CA
Chamber: Near Bag 2017
Experiment Category: Aerosol formation
Oxidant: Hydroxyl radical
Reactants: DECAMETHYLCYCLOPENTASILOXANE
Reaction Type: Photooxidation
Relative Humidity: 5
Temperature: 26.6
Seed Name: Ammonium sulfate
Dataset ID:
d789066
Description:
Goals:
Observing OH-initiated m-xylene reactions under SOA surrogate and NOx environment.
Summary:
Target: 1.1 ppmC SOA surrogate, 25 ppb NOx, 1 ppm H2O2, 25 ppb m-xylene (A)
INSTRUMENTS: SMPS, GC1, AMS, VTDMA, HTDMA, APM
Organization: UCR-CECERT-APL-Cocker Group
Lab Affiliation: University of California, Riverside, CE-CERT
Chamber: EPA chamber
Experiment Category: Photolysis, any phase, Blank/Control
Oxidant: Hydroxyl radical
Reactants: SOA surrogate, NOx, H2O2
Reaction Type: Photooxidation
Re…
Dataset ID:
d789339
Description:
Goals:
Photooxidation of MEMP with OH under black lights.
Summary:
Target: 1 ppm H2O2 + 80 ppb EGDBE (A)/ MEMP(B)
INSTRUMENTS: SMPS, GC1, AMS, APM, SYFT
Organization: UCR-CECERT-APL-Cocker Group
Lab Affiliation: University of California, Riverside, CE-CERT
Chamber: EPA chamber
Experiment Category: Photolysis, any phase, Aerosol formation, Aerosol aging
Oxidant: Hydroxyl radical
Reactants: MEMP, H2O2
Reaction Type: Photooxidation
Relative Humidity: 0.01
Temperature: 28
Pressure: 0.015'' H2O
Dataset ID:
d789324
Description:
Goals:
This experiment was performed to assess the reactive uptake behavior of trans beta-IEPOX that was synthesized for the experiment. Different particle inorganic compositions (mainly ammonium sulfate or AS) and different particle water content were investigated. Particles are injected into the chamber as deliquesced droplets (through a wet wall denuder) and they stabilize to their equilibrium particle liquid water content depending on their hygroscopicity.
Summary:
A small amount of organic…
Dataset ID:
d789548
Description:
Goals:
To quantify the nitrooxy-hydroperoxide yield and the SOA yield from nighttime RO2+HO2-dominated NO3-initiated chemistry of a-pinene by adding H2O2 + ozone + NO2 to the chamber.
Summary:
H2O2, NO2, and O3 were injected in the chamber and allowed to equilibrate, forming NO3 (and some N2O5) and probably HO2. Ammonium sulfate seed particles were injected. Then a-pinene was injected and decayed by simultaneous reaction with ozone and NO3. Gas phase was monitored by CF3O- CIMS and particle for…
Dataset ID:
d789199
Description:
Goals:
Gasoline photooxidation under NOx and SOA surrogate
Summary:
Target: 1.1 ppmC SOA surrogate, 50 ppb NOx, 250 uL Gasoline (A) + 1 ppmC H2O2 (both)
INSTRUMENTS: SMPS, GC1, AMS, VTDMA, HTDMA
Organization: UCR-CECERT-APL-Cocker Group
Lab Affiliation: University of California, Riverside, CE-CERT
Chamber: EPA chamber
Experiment Category: Photolysis, any phase, Blank/Control
Oxidant: Hydroxyl radical
Reactants: NOx, SOA Surrogate, H2O2
Reaction Type: Photooxidation
Relative Humidity: 0.01
Tempe…
Dataset ID:
d789626
Description:
Goals:
To quantify the nitrooxy-hydroperoxide yield and the SOA yield from nighttime RO2+HO2-dominated NO3-initiated chemistry of a-pinene by adding H2O2 + ozone + NO2 to the chamber. Part of a series of varying initial reactant concentrations slightly to target different chemical pathways. This one likely got high RO2+RO2 and RO2+HO2 chemistry
Summary:
H2O2, NO2, and O3 were injected in the chamber and allowed to equilibrate, forming NO3 (and some N2O5) and probably HO2. Ammonium sulfate seed …
Dataset ID:
d789564
For ancillary use only - not recommended as a primary research dataset. It has likely been superseded by newer and better datasets.
Description:
This dataset from NCDC (DSI 9640) contains monthly average temperature, precipitation, and Palmer Drought Indices: drought severity (PDSI), hydrological drought (PHDI), Z index, and modified drought severity (PMDI), for each climatic division in the 48 contiguous U.S. states, as well as Puerto Rico and the Virgin Islands. The period of record is January 1895 to April 1993. Monthly averages within a climatic division have been calculated by giving equal weight to stations reporting both tempera…
Dataset ID:
d885001
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