EPCAPE
Eastern Pacific Cloud Aerosol Precipitation Experiment
15 February 2023 - 14 February 2024
Lead Scientist: Lynn Russell
Observatory: amf, epc
Coastal cities provide the opportunity to characterize marine clouds and the substantial effects of manmade particles on cloud properties and processes. La Jolla lies to the north of San Diego, California, but it is often about a day downwind of the major pollution sources located in the ports of Los Angeles and Long Beach. The large dynamic range of aerosol particle concentrations combined with the multi-hour to multi-day persistence of stratocumulus cloud layers makes the site ideal for investigating the seasonal changes in cloud and aerosol properties as well as the quantitative relationships between cloud and aerosol properties.
The focus of this project is to characterize the extent, radiative properties, aerosol interactions, and precipitation characteristics of stratocumulus clouds in the Eastern Pacific across all four seasons at a coastal location, such as the Scripps Pier and the Scripps Mt. Soledad sites in La Jolla. An important enhancement to this study will be the collection of simultaneous in-cloud aerosol and droplet measurements to investigate the differences in these cloud properties during regional polluted and clean marine conditions. The combined observations will provide an unprecedented set of constraints for the following questions:
- Cloud and aerosol climatology: What are the seasonal and diurnal cycles of marine stratocumulus cloud and aerosol properties on the northeastern Pacific coast?
- Cloud radiative fluxes: How do cloud properties, including the ratio of direct-to-diffuse radiation, change as coastal clouds are advected inland?
- Aerosol-cloud interactions: Will retrieved cloud properties reflect the regional signatures of aerosol?
Each of these questions reflects a topic of current controversy in the literature that cannot be addressed without the type of comprehensive data set proposed here.
The relevance of this campaign to the ARM mission is its strategic location in an accessible and economically important region of the world that lacks long-term observations of its frequent, persistent, and climatically important coastal stratocumulus cloud cover.
The clouds lie in one of the largest regions of upwelling-driven stratocumulus layers that are most likely impacted by aerosol indirect effects, but climate models do not accurately simulate the processes that control their radiative effects. Furthermore, the coastal orography incites significant additional uncertainties related to cloud turbulence, air motion spectrum, and drop size distributions.
Finally, the aerosol in the region ranges from a clean marine background to frequent intrusions from a large and regionally homogeneous, well-characterized, surface‑based pollution source (the Los Angeles-Long Beach urban port megacity), providing a large dynamic range of aerosol conditions for investigation.
To complement and leverage EPCAPE, the Office of Naval Research (ONR) will support a 90-flight-hour deployment of the Naval Postgraduate School’s Twin Otter research aircraft during the May/June 2023 Southern California Interactions of Low cloud and Land Aerosol (SCILLA) experiment. Those research flights will provide a regional context for the point measurements in La Jolla and will add extensive below-, in-, and above-cloud measurements spanning an area encompassing a wide range of meteorological and, especially, aerosol conditions. The SCILLA team from the University of California Riverside and Clemson University will be supported by the DOE Atmospheric System Research (ASR) program to significantly augment the aerosol measurement capabilities on the Twin Otter in order to provide a much more comprehensive description of the sources, processing, chemistry, radiative and cloud-altering properties, and spatial distribution of the aerosols upwind of the San Diego area in general, and the EPCAPE study sites in particular.
Co-Investigators
Andrew Ackerman | Edwin Eloranta | Johannes Muelmenstaedt |
Allison Aiken | Ann Fridlind | Markus Petters |
Susannah Burrows | Dan Lubin | Israel Silber |
Rachel Chang | Mark Miller | Die Wang |
Timeline
- Child Campaign
Related Publications
2024
Gorkowski K, JE Lee, AM Shawon, RN Farley, NA Franco, KB Benedict, MK Dubey, and AC Aiken. 2024. EPCAPE-Partitioning Thrust-Los Alamos National Laboratory (EPCAPE-PT-LANL) Field Campaign Report. Ed. by Robert Stafford, ARM user facility. DOE/SC-ARM-24-013. 10.2172/2372608.
Gustafson, Jr. WI, AM Vogelmann, and JH Mather. 2024. DOE ARM Future of LASSO Workshop Report. Ed. by Robert Stafford, ARM user facility. DOE/SC-ARM-24-012. 10.2172/2376866.
Garnés-Morales G, M Costa, J Bravo-Aranda, M Granados-Muñoz, V Salgueiro, J Abril-Gago, S Fernández-Carvelo, J Andújar-Maqueda, A Valenzuela, I Foyo-Moreno, F Navas-Guzmán, L Alados-Arboledas, D Bortoli, and J Guerrero-Rascado. 2024. "Four Years of Atmospheric Boundary Layer Height Retrievals Using COSMIC-2 Satellite Data." Remote Sensing, 16(9), 10.3390/rs16091632.
Sedlacek AJ and RC Jackson. 2024. Single-Particle Soot Photometer (SP2) Black Carbon Number and Mass Concentrations. Ed. by Robert Stafford, ARM user facility. DOE/SC-ARM-TR-301. 10.2172/2341496.
Singh A and C Kuang. 2024. Scanning Mobility Particle Sizer (SMPS) Instrument Handbook. Ed. by Robert Stafford, ARM Climate Research Facility. DOE/SC-ARM-TR-147. 10.2172/1245993.
Singh A and C Kuang. 2024. Condensation Particle Counter (CPC) Instrument Handbook. Ed. by Robert Stafford, ARM Climate Research Facility. DOE/SC-ARM-TR-145. 10.2172/1245983.
Dorsey KS, CB Ireland, ME Mundy, RA Stafford, KK Palmer, MR Wasem, ME Prichard, JM Comstock, and I Silber. 2024. 2023 Atmospheric Radiation Measurement (ARM) Annual Report. Ed. by Robert Stafford, ARM user facility. DOE/SC-ARM-23-047. 10.2172/2281709.
2023
Wang D and MJ Bartholomew. 2023. Laser Disdrometer (LDIS) Instrument Handbook. Ed. by Robert Stafford, ARM user facility. DOE/SC-ARM-TR-137. 10.2172/1226796.
Feng Y, A Theisen, IA Lindenmaier, S Collis, SE Giangrande, JM Comstock, AA Matthews, MN Rocque, E Schuman, TG Wendler, V Castro, M Deng, D Zhang, S Xie, and JE Flaherty. 2023. ARM FY2024 Radar Plan. Ed. by Robert Stafford, ARM user facility. DOE/SC-ARM-TR-291. 10.2172/2217102.
2022
Giangrande S, J Comstock, S Collis, J Shilling, K Gaustad, K Kehoe, S Xie, and D Zhang. 2022. Translator Plan: A Coordinated Vision for Fiscal Years 2023-2025. Ed. by Robert Stafford, ARM user facility. DOE/SC-ARM-22-003. 10.2172/1893730.
View All Related Publications
Campaign Data Sets
IOP Participant | Data Source Name | Final Data |
---|---|---|
Kyle Gorkowski | Aerodynamic Part Sizer | Order Data |
Kyle Gorkowski | Cavity Attenuated Phase Shift Single Scattering Albedo Monitor | Order Data |
Kyle Gorkowski | Cloud Condensation Nuclei Counter | Order Data |
Kyle Gorkowski | Condensation Particle Counter | Order Data |
Kyle Gorkowski | Gas Monitors | Order Data |
Kyle Gorkowski | Ground-based Counterflow Virtual Impactor | Order Data |
Kyle Gorkowski | NO/NOx Analyzer | Order Data |
Kyle Gorkowski | Nano-Scanning Mobility Particle Sizer (SMPS) | Order Data |
Kyle Gorkowski | Particulate Matter and Gases | Order Data |
Kyle Gorkowski | Photoacoustic Extinctiometer | Order Data |
Kyle Gorkowski | Proton Transfer Reaction Mass Spectrometer | Order Data |
Kyle Gorkowski | Scanning Mobility Particle Sizer | Order Data |
Kyle Gorkowski | Single Particle Soot Photometer | Order Data |
Kyle Gorkowski | Soot Particle Aerosol Mass Spectrometer | Order Data |
Kyle Gorkowski | Wideband Integrated Bioaerosol Sensor | Order Data |
Markus Petters | Differential Mobility Analyzer (DMA) System with additional particle sizers/aerosol counters/ccn distribution calculations | Order Data |
Raquel Rodriguez Monje | Multi-Frequency mm-Wave Radar such as the CloudCube, G-band Radar Doppler Spectra Moments | Order Data |
Raquel Rodriguez Monje | Multi-Frequency mm-Wave Radar such as the CloudCube, G-band Radar Instantaneous Doppler Spectra | Order Data |
Raquel Rodriguez Monje | Multi-Frequency mm-Wave Radar such as the CloudCube, Ka-, W-, and G-band retrievals | Order Data |
James Smith | Liquid Chromatography Mass Spectrometry | Order Data |
James Smith | Nano-Scanning Mobility Particle Sizer (SMPS) | Order Data |
James Smith | Tandem Differential Mobility Analyzer | Order Data |
James Smith | Volatility Tandem Differential Mobility Analyzer | Order Data |
EPC Data Sources
Name | Full Name | Browse Data |
---|---|---|
ACSM |
Aerosol Chemical Speciation Monitor | Browse Data |
ACSMCDCE |
ACSM, corrected for composition-dependent collection efficiency | Browse Data |
AERI |
Atmospheric Emitted Radiance Interferometer | Browse Data |
AERINF |
AERI Noise Filtered | Browse Data |
AETH |
Aethalometer | Browse Data |
AOD-MFRSR |
Aerosol Optical Depth (AOD) derived from MFRSR measurements | Browse Data |
AOP |
Aerosol Optical Properties | Browse Data |
AOS |
Aerosol Observing System | Browse Data |
AOSMET |
Meteorological Measurements associated with the Aerosol Observing System | Browse Data |
APS |
Aerodynamic Particle Sizer | Browse Data |
ARMBE |
ARM Best Estimate Data Products | Browse Data |
CAMSITE |
camera that monitors a site area | Browse Data |
CCN |
Cloud Condensation Nuclei Particle Counter | Browse Data |
CCNKAPPA |
CCN Counter derived hygroscopicity parameter kappa | Browse Data |
CEIL |
Ceilometer | Browse Data |
CO-ANALYZER |
Carbon Monoxide Analyzer | Browse Data |
CPC |
Condensation Particle Counter | Browse Data |
CSPHOT |
Sunphotometer | Browse Data |
DL |
Doppler Lidar | Browse Data |
DLPROF-WIND |
Doppler Lidar Horizontal Wind Profiles | Browse Data |
DLPROF-WSTATS |
Doppler Lidar Wind Statistics Profiles | Browse Data |
ECOR |
Eddy Correlation Flux Measurement System | Browse Data |
GNDRAD |
Ground Radiometers on Stand for Upwelling Radiation | Browse Data |
HTDMA |
Humidified Tandem Differential Mobility Analyzer | Browse Data |
HUMIDIGRAPH |
humidigraph class for DQR submissions | Browse Data |
INS |
Ice Nucleation Spectrometer for INP measurement | Browse Data |
INTERPSONDE |
Interpolated Sonde | Browse Data |
IRT |
Infrared Thermometer | Browse Data |
KASACR |
Ka-Band Scanning ARM Cloud Radar | Browse Data |
KAZR |
Ka ARM Zenith Radar | Browse Data |
KAZRARSCL |
Active Remote Sensing of CLouds (ARSCL) product using Ka-band ARM Zenith Radars | Browse Data |
KAZRCFRCOR |
Ka-Band ARM Zenith RADAR (KAZR) CF-Radial, Corrected VAP | Browse Data |
LDIS |
Laser Disdrometer | Browse Data |
LDQUANTS |
Laser Disdrometer Quantities | Browse Data |
MAWS |
Automatic Weather Station | Browse Data |
MERGEDSMPSAPS |
merged size distribution from SMPS and APS | Browse Data |
MET |
Surface Meteorological Instrumentation | Browse Data |
MFR |
Multifilter Radiometer | Browse Data |
MFRSR |
Multifilter Rotating Shadowband Radiometer | Browse Data |
MFRSRCLDOD |
Cloud Optical Properties from MFRSR Using Min Algorithm | Browse Data |
MONITORINST |
sensors for providing instrument system monitoring | Browse Data |
MPL |
Micropulse Lidar | Browse Data |
MPLCMASK |
Cloud mask from Micropulse Lidar | Browse Data |
MPLCMASKML |
Micropulse Lidar Cloud Mask Machine Learning VAP | Browse Data |
MWR |
Microwave Radiometer | Browse Data |
MWR3C |
Microwave Radiometer, 3 Channel | Browse Data |
MWRHF |
Microwave Radiometer - High Frequency | Browse Data |
MWRRET |
MWR Retrievals | Browse Data |
MWRRETV2 |
MWR Retrievals with MWRRET Version 2 | Browse Data |
NEPHELOMETER |
Nephelometer | Browse Data |
NFOV |
Narrow Field of View Zenith Radiometer | Browse Data |
OPC |
Optical Particle Counter | Browse Data |
ORG |
Optical Rain Gauge | Browse Data |
OZONE |
Ozone Monitor | Browse Data |
PBLHT |
Planetary Boundary Layer Height | Browse Data |
PSAP |
Particle Soot Absorption Photometer | Browse Data |
QCECOR |
Quality Controlled Eddy Correlation Flux Measurement | Browse Data |
QCRAD |
Data Quality Assessment for ARM Radiation Data | Browse Data |
RADFLUXANAL |
Radiative Flux Analysis | Browse Data |
RAIN |
Rain Gauge | Browse Data |
RWP |
Radar Wind Profiler | Browse Data |
SASHE |
Shortwave Array Spectroradiometer-Hemispheric | Browse Data |
SASZE |
Shortwave Array Spectroradiometer-Zenith | Browse Data |
SEBS |
Surface Energy Balance System | Browse Data |
SKYRAD |
Sky Radiometers on Stand for Downwelling Radiation | Browse Data |
SMPS |
Scanning mobility particle sizer | Browse Data |
SO2 |
Sulfur Dioxide Monitor | Browse Data |
SONDE |
Balloon-Borne Sounding System | Browse Data |
SONDEGRID |
Gridded Sonde VAP Product | Browse Data |
SP2 |
Single Particle Soot Photometer | Browse Data |
TROPOE |
Tropospheric Optimal Estimation Retrieval | Browse Data |
TSI |
Total Sky Imager | Browse Data |
UHSAS |
Ultra-High Sensitivity Aerosol Spectrometer | Browse Data |
VARANAL |
Constrained Variational Analysis | Browse Data |
VDIS |
Video Disdrometer | Browse Data |
VDISQUANTS |
Video Disdrometer VAP | Browse Data |
VISST |
Minnis Cloud Products Using Visst Algorithm | Browse Data |
WB |
Weighing Bucket Precipitation Gauge | Browse Data |
WSACR |
W-band Scanning ARM Cloud Radar | Browse Data |