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).
Revised: March 22, 2011 |
Published: February 23, 2011
Citation
Wang Y., C.N. Long, J.H. Mather, and X. Liu. 2011.Convective Signals from Surface Measurements at ARM Tropical Western Pacific Site: Manus.Climate Dynamics 36, no. 3-4:431-449.PNNL-SA-58996.doi:10.1007/s00382-009-0736-z