Lesley L. Smith – Extreme California Precip

All plots preliminary.

Physical phenomena related to subseasonal and seasonal Western US precipitation
Integrated Vapor Transport

ECMWF Reanalysis 5 (ERA5) Data

Re. 28-year Fixed Climatologies: 1940-1967, 1968-1995, 1996-2023

Conditioning on ENSO
1940+ DJF ENSO Phases from ERA5 Temperature anomalies (wrt 30-year fixed climos) for Nino 3.4 region
and where index > 0.5 is El Nino, index < -0.5 is La Nina.

El Nino Anomalies Nov-Mar 1940-1967, 1968-1995, 1996-2023

where Jan-Mar data conditioned with current year DJF ENSO index, while Nov-Dec data conditioned with following year DJF ENSO index

La Nina Anomalies Nov-Mar 1940-1967, 1968-1995, 1996-2023

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Conditioning on QBO

Negative QBO Anomalies Nov-Mar 1940-1967 1968-1995 1996-2023

Positive QBO Anomalies Nov-Mar 1940-1967 1968-1995 1996-2023

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Conditioning on OMI MJO
Daily OLR_only MJO Index (OMI) phases computed via mjoindices code (https://github.com/cghoffmann/mjoindices)
using ERA5 OLR data from M.Gehne

OMI Phase_1 Anomalies 1940-1967 1968-1995 1996-2023

where only OMI phases corresponding to OMI amplitudes > 1 are utilized

OMI Phase_2 Anomalies 1940-1967 1968-1995 1996-2023

OMI Phase_3 Anomalies 1940-1967 1968-1995 1996-2023

OMI Phase_4 Anomalies 1940-1967 1968-1995 1996-2023

OMI Phase_5 Anomalies 1940-1967 1968-1995 1996-2023

OMI Phase_6 Anomalies 1940-1967 1968-1995 1996-2023

OMI Phase_7 Anomalies 1940-1967 1968-1995 1996-2023

OMI Phase_8 Anomalies 1940-1967 1968-1995 1996-2023

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Conditioning on OMI MJO & ENSO
Daily OLR_only MJO Index (OMI) phases computed via mjoindices code (https://github.com/cghoffmann/mjoindices)
using ERA5 OLR data from M.Gehne

El_Nino OMI_Phase_1 Anomalies 1940-1967 1968-1995 1996-2023

El_Nino OMI_Phase_2 Anomalies 1940-1967 1968-1995 1996-2023

El_Nino OMI_Phase_3 Anomalies 1940-1967 1968-1995 1996-2023

El_Nino OMI_Phase_4 Anomalies 1940-1967 1968-1995 1996-2023

El_Nino OMI_Phase_5 Anomalies 1940-1967 1968-1995 1996-2023

El_Nino OMI_Phase_6 Anomalies 1940-1967 1968-1995 1996-2023

El_Nino OMI_Phase_7 Anomalies 1940-1967 1968-1995 1996-2023

El_Nino OMI_Phase_8 Anomalies 1940-1967 1968-1995 1996-2023

La_Nina OMI_Phase_1 Anomalies 1940-1967 1968-1995 1996-2023

La_Nina OMI_Phase_2 Anomalies 1940-1967 1968-1995 1996-2023

La_Nina OMI_Phase_3 Anomalies 1940-1967 1968-1995 1996-2023

La_Nina OMI_Phase_4 Anomalies 1940-1967 1968-1995 1996-2023

La_Nina OMI_Phase_5 Anomalies 1940-1967 1968-1995 1996-2023

La_Nina OMI_Phase_6 Anomalies 1940-1967 1968-1995 1996-2023

La_Nina OMI_Phase_7 Anomalies 1940-1967 1968-1995 1996-2023

La_Nina OMI_Phase_8 Anomalies 1940-1967 1968-1995 1996-2023

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Conditioning on OMI MJO & QBO
Daily OLR_only MJO Index (OMI) phases computed via mjoindices code (https://github.com/cghoffmann/mjoindices)
using ERA5 OLR data from M.Gehne
where QBO is equatorial zonal mean u50mb and ENSO neutral

Negative_QBO OMI_Phase_1 Anomalies 1940-1967 1968-1995 1996-2023