Convective Signals from Surface Measurements at ARM Tropical Western Pacific Site: Manus

Journal Article · Wed Feb 23 04:00:00 EST 2011 · Climate Dynamics, 36(3-4):431-449

DOI:https://doi.org/10.1007/s00382-009-0736-z· OSTI ID:1009739

Wang, Yi; Long, Charles N; Mather, James H; Liu, Xiaodong

The Madden-Julian Oscillation (MJO) signal has been detected using observations from the Department of Energy (DOE) Atmospheric Radiation Measurement (ARM) Climate Research Facility (ACRF) Tropical Western Pacific (TWP). With downwelling shortwave radiative fluxes and fractional sky cover from the ACRF TWP Manus site, and the statistical tools of wavelet and spectrum power, we report finding major convective signals from surface observations spanning the period from 1996 to 2006. Our findings are confirmed with the satellite-retrieved values of precipitation from the Global Precipitation Climatology Project (GPCP), and interpolated outgoing longwave radiation (OLR) satellite measurements from the National Oceanic and Atmospheric Administration (NOAA) for the same location. Our results indicate that the MJO convective signal has a strong seasonal-to-interannual evolution that is likely correlated with the interannual variability of El Ni ˜no Southern Oscillation (ENSO).

• Research Organization: Pacific Northwest National Laboratory (PNNL), Richland, WA (US)
• Sponsoring Organization: USDOE
• DOE Contract Number: AC05-76RL01830
• OSTI ID: 1009739
• Report Number(s): PNNL-SA-58996; KP1205010
• Journal Information: Climate Dynamics, 36(3-4):431-449, Journal Name: Climate Dynamics, 36(3-4):431-449
• Country of Publication: United States
• Language: English