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Modulation of the Extratropical Circulation by Combined Activity of the Madden–Julian Oscillation and Equatorial Rossby Waves. Lawrence C. Gloeckler and Dr. Paul E. Roundy Department of Atmospheric and Environmental Sciences, The University at Albany – SUNY

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Modulation of the Extratropical Circulation by Combined Activity of the Madden–Julian Oscillation and Equatorial Rossby Waves

Lawrence C. Gloeckler and Dr. Paul E. Roundy

Department of Atmospheric and Environmental Sciences, The University at Albany – SUNY

DAES Undergraduate Thesis Presentation

2 May 2011

Albany, NY


Overview
Overview Activity of the Madden–Julian Oscillation and Equatorial Rossby Waves

MJO Convection

Equatorial Rossby Waves

Extratropical Rossby Waves


Background information
Background Information Activity of the Madden–Julian Oscillation and Equatorial Rossby Waves


MJO Circulation Activity of the Madden–Julian Oscillation and Equatorial Rossby Waves

MJO

200-hPa streamfunction (contoured every 10 × 105 m2 s−1), total wind (vectors in m s−1), and MJO-filtered Outgoing Longwave Radiation (OLR) anomaly (shaded < −16 W m−2).

Adapted from Fig. 2b of Kiladis et al. (2005).


Mjo circulation
MJO Circulation Activity of the Madden–Julian Oscillation and Equatorial Rossby Waves

H

MJO

H

200-hPa streamfunction (contoured every 10 × 105 m2 s−1), total wind (vectors in m s−1), and MJO-filtered Outgoing Longwave Radiation (OLR) anomaly (shaded < −16 W m−2).

Adapted from Fig. 2b of Kiladis et al. (2005).


Mjo circulation1
MJO Circulation Activity of the Madden–Julian Oscillation and Equatorial Rossby Waves

H

L

MJO

L

H

300-hPa streamfunction (contoured every 10 × 105 m2 s−1), total wind (vectors in m s−1), and MJO-filtered Outgoing Longwave Radiation (OLR) anomaly (shaded < −16 W m−2).

Adapted from Fig. 2b of Kiladis et al. (2005).


Er wave development
ER Wave Development Activity of the Madden–Julian Oscillation and Equatorial Rossby Waves

MJO

EQ

300-hPa


Er wave development1
ER Wave Development Activity of the Madden–Julian Oscillation and Equatorial Rossby Waves

H

MJO

EQ

H

300-hPa


Er wave development2
ER Wave Development Activity of the Madden–Julian Oscillation and Equatorial Rossby Waves

L

H

MJO

EQ

H

L

300-hPa


Er wave development3
ER Wave Development Activity of the Madden–Julian Oscillation and Equatorial Rossby Waves

H

L

H

MJO

EQ

H

H

L

300-hPa


Er wave development4
ER Wave Development Activity of the Madden–Julian Oscillation and Equatorial Rossby Waves

H

L

H

Background Flow

MJO

EQ

Background Flow

H

H

L

300-hPa


Er wave development5
ER Wave Development Activity of the Madden–Julian Oscillation and Equatorial Rossby Waves

H

L

H

L

MJO

EQ

L

H

H

L

300-hPa


Er wave development6
ER Wave Development Activity of the Madden–Julian Oscillation and Equatorial Rossby Waves

H

L

H

L

MJO

EQ

L

H

H

L

300-hPa


Data and methodology
Data and Methodology Activity of the Madden–Julian Oscillation and Equatorial Rossby Waves

Analyzed satellite-derived OLR data and NCEP—NCAR 40-year reanalysis data pertaining to 300-hPa geopotential height and wind anomalies

Identified set of dates during NH winter (1 Nov–31 Mar) when MJO was located over Maritime Continent

Position over Maritime Continent consistent with RMM Phase 4


Data and methodology1
Data and Methodology Activity of the Madden–Julian Oscillation and Equatorial Rossby Waves

Identified longitude where ER wave crossing occurred most frequently for RMM Phase 4

Developed set of dates in which ER waves crossed identified longitude


Results hovm llers
Results: Hovmöllers Activity of the Madden–Julian Oscillation and Equatorial Rossby Waves


Mjo only
MJO Only Activity of the Madden–Julian Oscillation and Equatorial Rossby Waves

RMM Phase 4

OLR (shaded between 7.5°S and 7.5°N; W m-2) and 300-hPa geopotential height anomaly (contoured between 40°N and 50°N; red=positive, blue=negative)


Mjo only1
MJO Only Activity of the Madden–Julian Oscillation and Equatorial Rossby Waves

RMM Phase 4

OLR (shaded between 7.5°S and 7.5°N; W m-2) and 300-hPa geopotential height anomaly (contoured between 40°N and 50°N; red=positive, blue=negative)


Mjo only2
MJO Only Activity of the Madden–Julian Oscillation and Equatorial Rossby Waves

RMM Phase 4

OLR (shaded between 7.5°S and 7.5°N; W m-2) and 300-hPa geopotential height anomaly (contoured between 40°N and 50°N; red=positive, blue=negative)


Er wave only
ER Wave Only Activity of the Madden–Julian Oscillation and Equatorial Rossby Waves

RMM Phase 4, ER Base Lon 155E

OLR (shaded between 7.5°S and 7.5°N; W m-2) and 300-hPa geopotential height anomaly (contoured between 40°N and 50°N; red=positive, blue=negative)


Er wave only1
ER Wave Only Activity of the Madden–Julian Oscillation and Equatorial Rossby Waves

RMM Phase 4, ER Base Lon 155E

OLR (shaded between 7.5°S and 7.5°N; W m-2) and 300-hPa geopotential height anomaly (contoured between 40°N and 50°N; red=positive, blue=negative)


Er wave only2
ER Wave Only Activity of the Madden–Julian Oscillation and Equatorial Rossby Waves

RMM Phase 4, ER Base Lon 155E

OLR (shaded between 7.5°S and 7.5°N; W m-2) and 300-hPa geopotential height anomaly (contoured between 40°N and 50°N; red=positive, blue=negative)


Sum of mjo and er wave
Sum of MJO and ER Wave Activity of the Madden–Julian Oscillation and Equatorial Rossby Waves

RMM Phase 4, ER Base Lon 155E

OLR (shaded between 7.5°S and 7.5°N; W m-2) and 300-hPa geopotential height anomaly (contoured between 40°N and 50°N; red=positive, blue=negative)


Sum of mjo and er wave1
Sum of MJO and ER Wave Activity of the Madden–Julian Oscillation and Equatorial Rossby Waves

RMM Phase 4, ER Base Lon 155E

OLR (shaded between 7.5°S and 7.5°N; W m-2) and 300-hPa geopotential height anomaly (contoured between 40°N and 50°N; red=positive, blue=negative)


Sum of mjo and er wave2
Sum of MJO and ER Wave Activity of the Madden–Julian Oscillation and Equatorial Rossby Waves

RMM Phase 4, ER Base Lon 155E

OLR (shaded between 7.5°S and 7.5°N; W m-2) and 300-hPa geopotential height anomaly (contoured between 40°N and 50°N; red=positive, blue=negative)


Sum of mjo and er wave3
Sum of MJO and ER Wave Activity of the Madden–Julian Oscillation and Equatorial Rossby Waves

RMM Phase 4, ER Base Lon 155E

OLR (shaded between 7.5°S and 7.5°N; W m-2) and 300-hPa geopotential height anomaly (contoured between 40°N and 50°N; red=positive, blue=negative)


Sum of mjo and er wave4
Sum of MJO and ER Wave Activity of the Madden–Julian Oscillation and Equatorial Rossby Waves

RMM Phase 4, ER Base Lon 155E

OLR (shaded between 7.5°S and 7.5°N; W m-2) and 300-hPa geopotential height anomaly (contoured between 40°N and 50°N; red=positive, blue=negative)


Simultaneous mjo and er wave
Simultaneous MJO and ER Wave Activity of the Madden–Julian Oscillation and Equatorial Rossby Waves

RMM Phase 4, ER Base Lon 155E

OLR (shaded between 7.5°S and 7.5°N; W m-2) and 300-hPa geopotential height anomaly (contoured between 40°N and 50°N; red=positive, blue=negative)


Simultaneous mjo and er wave1
Simultaneous MJO and ER Wave Activity of the Madden–Julian Oscillation and Equatorial Rossby Waves

RMM Phase 4, ER Base Lon 155E

OLR (shaded between 7.5°S and 7.5°N; W m-2) and 300-hPa geopotential height anomaly (contoured between 40°N and 50°N; red=positive, blue=negative)


Simultaneous mjo and er wave2
Simultaneous MJO and ER Wave Activity of the Madden–Julian Oscillation and Equatorial Rossby Waves

RMM Phase 4, ER Base Lon 155E

OLR (shaded between 7.5°S and 7.5°N; W m-2) and 300-hPa geopotential height anomaly (contoured between 40°N and 50°N; red=positive, blue=negative)


Simultaneous mjo and er wave3
Simultaneous MJO and ER Wave Activity of the Madden–Julian Oscillation and Equatorial Rossby Waves

RMM Phase 4, ER Base Lon 155E

OLR (shaded between 7.5°S and 7.5°N; W m-2) and 300-hPa geopotential height anomaly (contoured between 40°N and 50°N; red=positive, blue=negative)


Simultaneous mjo and er wave4
Simultaneous MJO and ER Wave Activity of the Madden–Julian Oscillation and Equatorial Rossby Waves

RMM Phase 4, ER Base Lon 155E

OLR (shaded between 7.5°S and 7.5°N; W m-2) and 300-hPa geopotential height anomaly (contoured between 40°N and 50°N; red=positive, blue=negative)


Mjo only3
MJO Only Activity of the Madden–Julian Oscillation and Equatorial Rossby Waves

RMM Phase 4

OLR (shaded between 7.5°S and 7.5°N; W m-2) and 300-hPa geopotential height anomaly (contoured between 40°N and 50°N; red=positive, blue=negative)


Simultaneous mjo and er wave5
Simultaneous MJO and ER Wave Activity of the Madden–Julian Oscillation and Equatorial Rossby Waves

RMM Phase 4, ER Base Lon 155E

OLR (shaded between 7.5°S and 7.5°N; W m-2) and 300-hPa geopotential height anomaly (contoured between 40°N and 50°N; red=positive, blue=negative)


Significance test
Significance Test Activity of the Madden–Julian Oscillation and Equatorial Rossby Waves

  • Randomly selected a list of dates associated with RMM phase 4 equal to number of ER wave events counted at identified base point

    • Developed composite MJO with same number of degrees of freedom associated with combined composite

  • Generated composite for random dates and repeated 1,000 times

    • Compared composite result to composite generated by randomly selecting ER wave events during RMM phase 4


Significance test1
Significance Test Activity of the Madden–Julian Oscillation and Equatorial Rossby Waves

  • Determined mean amplitude of random MJO composite is approximately one half mean amplitude of simultaneous composite between 40°N and 50°N

  • Two distributions demonstrated mean amplitude differences significantly larger than zero at 95% confidence level


Results composites
Results: Composites Activity of the Madden–Julian Oscillation and Equatorial Rossby Waves


Mjo only4
MJO Only Activity of the Madden–Julian Oscillation and Equatorial Rossby Waves

OLR, 300-hPa Height and Wind Anomaly, Lag = –5 days, RMM Phase 4

Positive 300-hPa height anomaly (20 dam intervals)

Negative 300-hPa height anomaly (20 dam intervals)

u/v wind anomaly (magnitude exceeding ± 2 m s-1)


Mjo only5
MJO Only Activity of the Madden–Julian Oscillation and Equatorial Rossby Waves

OLR, 300-hPa Height and Wind Anomaly, Lag = –4 days, RMM Phase 4

Positive 300-hPa height anomaly (20 dam intervals)

Negative 300-hPa height anomaly (20 dam intervals)

u/v wind anomaly (magnitude exceeding ± 2 m s-1)


Mjo only6
MJO Only Activity of the Madden–Julian Oscillation and Equatorial Rossby Waves

OLR, 300-hPa Height and Wind Anomaly, Lag = –3 days, RMM Phase 4

Positive 300-hPa height anomaly (20 dam intervals)

Negative 300-hPa height anomaly (20 dam intervals)

u/v wind anomaly (magnitude exceeding ± 2 m s-1)


Mjo only7
MJO Only Activity of the Madden–Julian Oscillation and Equatorial Rossby Waves

OLR, 300-hPa Height and Wind Anomaly, Lag = –2 days, RMM Phase 4

Positive 300-hPa height anomaly (20 dam intervals)

Negative 300-hPa height anomaly (20 dam intervals)

u/v wind anomaly (magnitude exceeding ± 2 m s-1)


Mjo only8
MJO Only Activity of the Madden–Julian Oscillation and Equatorial Rossby Waves

OLR, 300-hPa Height and Wind Anomaly, Lag = –1 day, RMM Phase 4

Positive 300-hPa height anomaly (20 dam intervals)

Negative 300-hPa height anomaly (20 dam intervals)

u/v wind anomaly (magnitude exceeding ± 2 m s-1)


Mjo only9
MJO Only Activity of the Madden–Julian Oscillation and Equatorial Rossby Waves

OLR, 300-hPa Height and Wind Anomaly, Lag = 0 days, RMM Phase 4

Positive 300-hPa height anomaly (20 dam intervals)

Negative 300-hPa height anomaly (20 dam intervals)

u/v wind anomaly (magnitude exceeding ± 2 m s-1)


Mjo only10
MJO Only Activity of the Madden–Julian Oscillation and Equatorial Rossby Waves

OLR, 300-hPa Height and Wind Anomaly, Lag = 1 day, RMM Phase 4

OLR, 300-hPa Height and Wind Anomaly, Lag = 1 days, RMM Phase 4

Positive 300-hPa height anomaly (20 dam intervals)

Negative 300-hPa height anomaly (20 dam intervals)

u/v wind anomaly (magnitude exceeding ± 2 m s-1)


Mjo only11
MJO Only Activity of the Madden–Julian Oscillation and Equatorial Rossby Waves

OLR, 300-hPa Height and Wind Anomaly, Lag = 2 days, RMM Phase 4

Positive 300-hPa height anomaly (20 dam intervals)

Negative 300-hPa height anomaly (20 dam intervals)

u/v wind anomaly (magnitude exceeding ± 2 m s-1)


Mjo only12
MJO Only Activity of the Madden–Julian Oscillation and Equatorial Rossby Waves

OLR, 300-hPa Height and Wind Anomaly, Lag = 3 days, RMM Phase 4

Positive 300-hPa height anomaly (20 dam intervals)

Negative 300-hPa height anomaly (20 dam intervals)

u/v wind anomaly (magnitude exceeding ± 2 m s-1)


Mjo only13
MJO Only Activity of the Madden–Julian Oscillation and Equatorial Rossby Waves

OLR, 300-hPa Height and Wind Anomaly, Lag = 4 days, RMM Phase 4

Positive 300-hPa height anomaly (20 dam intervals)

Negative 300-hPa height anomaly (20 dam intervals)

u/v wind anomaly (magnitude exceeding ± 2 m s-1)


Mjo only14
MJO Only Activity of the Madden–Julian Oscillation and Equatorial Rossby Waves

OLR, 300-hPa Height and Wind Anomaly, Lag = 5 days, RMM Phase 4

Positive 300-hPa height anomaly (20 dam intervals)

Negative 300-hPa height anomaly (20 dam intervals)

u/v wind anomaly (magnitude exceeding ± 2 m s-1)


Er wave only3
ER Wave Only Activity of the Madden–Julian Oscillation and Equatorial Rossby Waves

OLR, 300-hPa Height and Wind Anomaly, Lag = –5 days, ER Base Lon 155E

Positive 300-hPa height anomaly (20 dam intervals)

Negative 300-hPa height anomaly (20 dam intervals)

u/v wind anomaly (magnitude exceeding ± 1 m s-1)


Er wave only4
ER Wave Only Activity of the Madden–Julian Oscillation and Equatorial Rossby Waves

OLR, 300-hPa Height and Wind Anomaly, Lag = –5 days, ER Base Lon 155E

Positive 300-hPa height anomaly (20 dam intervals)

Negative 300-hPa height anomaly (20 dam intervals)

u/v wind anomaly (magnitude exceeding ± 1 m s-1)


Er wave only5
ER Wave Only Activity of the Madden–Julian Oscillation and Equatorial Rossby Waves

OLR, 300-hPa Height and Wind Anomaly, Lag = –5 days, ER Base Lon 155E

Positive 300-hPa height anomaly (20 dam intervals)

Negative 300-hPa height anomaly (20 dam intervals)

u/v wind anomaly (magnitude exceeding ± 1 m s-1)


Er wave only6
ER Wave Only Activity of the Madden–Julian Oscillation and Equatorial Rossby Waves

OLR, 300-hPa Height and Wind Anomaly, Lag = –4 days, ER Base Lon 155E

Positive 300-hPa height anomaly (20 dam intervals)

Negative 300-hPa height anomaly (20 dam intervals)

u/v wind anomaly (magnitude exceeding ± 1 m s-1)


Er wave only7
ER Wave Only Activity of the Madden–Julian Oscillation and Equatorial Rossby Waves

OLR, 300-hPa Height and Wind Anomaly, Lag = –3 days, ER Base Lon 155E

Positive 300-hPa height anomaly (20 dam intervals)

Negative 300-hPa height anomaly (20 dam intervals)

u/v wind anomaly (magnitude exceeding ± 1 m s-1)


Er wave only8
ER Wave Only Activity of the Madden–Julian Oscillation and Equatorial Rossby Waves

OLR, 300-hPa Height and Wind Anomaly, Lag = –2 days, ER Base Lon 155E

Positive 300-hPa height anomaly (20 dam intervals)

Negative 300-hPa height anomaly (20 dam intervals)

u/v wind anomaly (magnitude exceeding ± 1 m s-1)


Er wave only9
ER Wave Only Activity of the Madden–Julian Oscillation and Equatorial Rossby Waves

OLR, 300-hPa Height and Wind Anomaly, Lag = –1 day, ER Base Lon 155E

Positive 300-hPa height anomaly (20 dam intervals)

Negative 300-hPa height anomaly (20 dam intervals)

u/v wind anomaly (magnitude exceeding ± 1 m s-1)


Er wave only10
ER Wave Only Activity of the Madden–Julian Oscillation and Equatorial Rossby Waves

OLR, 300-hPa Height and Wind Anomaly, Lag = 0 days, ER Base Lon 155E

Positive 300-hPa height anomaly (20 dam intervals)

Negative 300-hPa height anomaly (20 dam intervals)

u/v wind anomaly (magnitude exceeding ± 1 m s-1)


Er wave only11
ER Wave Only Activity of the Madden–Julian Oscillation and Equatorial Rossby Waves

OLR, 300-hPa Height and Wind Anomaly, Lag = 1 day, ER Base Lon 155E

Positive 300-hPa height anomaly (20 dam intervals)

Negative 300-hPa height anomaly (20 dam intervals)

u/v wind anomaly (magnitude exceeding ± 1 m s-1)


Er wave only12
ER Wave Only Activity of the Madden–Julian Oscillation and Equatorial Rossby Waves

OLR, 300-hPa Height and Wind Anomaly, Lag = 2 days, ER Base Lon 155E

Positive 300-hPa height anomaly (20 dam intervals)

Negative 300-hPa height anomaly (20 dam intervals)

u/v wind anomaly (magnitude exceeding ± 1 m s-1)


Er wave only13
ER Wave Only Activity of the Madden–Julian Oscillation and Equatorial Rossby Waves

OLR, 300-hPa Height and Wind Anomaly, Lag = 3 days, ER Base Lon 155E

Positive 300-hPa height anomaly (20 dam intervals)

Negative 300-hPa height anomaly (20 dam intervals)

u/v wind anomaly (magnitude exceeding ± 1 m s-1)


Er wave only14
ER Wave Only Activity of the Madden–Julian Oscillation and Equatorial Rossby Waves

OLR, 300-hPa Height and Wind Anomaly, Lag = 4 days, ER Base Lon 155E

Positive 300-hPa height anomaly (20 dam intervals)

Negative 300-hPa height anomaly (20 dam intervals)

u/v wind anomaly (magnitude exceeding ± 1 m s-1)


Er wave only15
ER Wave Only Activity of the Madden–Julian Oscillation and Equatorial Rossby Waves

OLR, 300-hPa Height and Wind Anomaly, Lag = 5 days, ER Base Lon 155E

Positive 300-hPa height anomaly (20 dam intervals)

Negative 300-hPa height anomaly (20 dam intervals)

u/v wind anomaly (magnitude exceeding ± 1 m s-1)


Simultaneous mjo er wave
Simultaneous MJO/ER Wave Activity of the Madden–Julian Oscillation and Equatorial Rossby Waves

OLR, 300-hPa Height and Wind Anomaly, Lag = –5 days, RMM Phase 4, ER Base Lon 155E

Positive 300-hPa height anomaly (20 dam intervals)

Negative 300-hPa height anomaly (20 dam intervals)

u/v wind anomaly (magnitude exceeding ± 2 m s-1)


Simultaneous mjo er wave1
Simultaneous MJO/ER Wave Activity of the Madden–Julian Oscillation and Equatorial Rossby Waves

OLR, 300-hPa Height and Wind Anomaly, Lag = –4 days, RMM Phase 4, ER Base Lon 155E

Positive 300-hPa height anomaly (20 dam intervals)

Negative 300-hPa height anomaly (20 dam intervals)

u/v wind anomaly (magnitude exceeding ± 2 m s-1)


Simultaneous mjo er wave2
Simultaneous MJO/ER Wave Activity of the Madden–Julian Oscillation and Equatorial Rossby Waves

OLR, 300-hPa Height and Wind Anomaly, Lag = –3 days, RMM Phase 4, ER Base Lon 155E

Positive 300-hPa height anomaly (20 dam intervals)

Negative 300-hPa height anomaly (20 dam intervals)

u/v wind anomaly (magnitude exceeding ± 2 m s-1)


Simultaneous mjo er wave3
Simultaneous MJO/ER Wave Activity of the Madden–Julian Oscillation and Equatorial Rossby Waves

OLR, 300-hPa Height and Wind Anomaly, Lag = –2 days, RMM Phase 4, ER Base Lon 155E

Positive 300-hPa height anomaly (20 dam intervals)

Negative 300-hPa height anomaly (20 dam intervals)

u/v wind anomaly (magnitude exceeding ± 2 m s-1)


Simultaneous mjo er wave4
Simultaneous MJO/ER Wave Activity of the Madden–Julian Oscillation and Equatorial Rossby Waves

OLR, 300-hPa Height and Wind Anomaly, Lag = –1 day, RMM Phase 4, ER Base Lon 155E

Positive 300-hPa height anomaly (20 dam intervals)

Negative 300-hPa height anomaly (20 dam intervals)

u/v wind anomaly (magnitude exceeding ± 2 m s-1)


Simultaneous mjo er wave5
Simultaneous MJO/ER Wave Activity of the Madden–Julian Oscillation and Equatorial Rossby Waves

OLR, 300-hPa Height and Wind Anomaly, Lag = 0 days, RMM Phase 4, ER Base Lon 155E

Positive 300-hPa height anomaly (20 dam intervals)

Negative 300-hPa height anomaly (20 dam intervals)

u/v wind anomaly (magnitude exceeding ± 2 m s-1)


Simultaneous mjo er wave6
Simultaneous MJO/ER Wave Activity of the Madden–Julian Oscillation and Equatorial Rossby Waves

OLR, 300-hPa Height and Wind Anomaly, Lag = 1 day, RMM Phase 4, ER Base Lon 155E

Positive 300-hPa height anomaly (20 dam intervals)

Negative 300-hPa height anomaly (20 dam intervals)

u/v wind anomaly (magnitude exceeding ± 2 m s-1)


Simultaneous mjo er wave7
Simultaneous MJO/ER Wave Activity of the Madden–Julian Oscillation and Equatorial Rossby Waves

OLR, 300-hPa Height and Wind Anomaly, Lag = 2 days, RMM Phase 4, ER Base Lon 155E

Positive 300-hPa height anomaly (20 dam intervals)

Negative 300-hPa height anomaly (20 dam intervals)

u/v wind anomaly (magnitude exceeding ± 2 m s-1)


Simultaneous mjo er wave8
Simultaneous MJO/ER Wave Activity of the Madden–Julian Oscillation and Equatorial Rossby Waves

OLR, 300-hPa Height and Wind Anomaly, Lag = 3 days, RMM Phase 4, ER Base Lon 155E

Positive 300-hPa height anomaly (20 dam intervals)

Negative 300-hPa height anomaly (20 dam intervals)

u/v wind anomaly (magnitude exceeding ± 2 m s-1)


Simultaneous mjo er wave9
Simultaneous MJO/ER Wave Activity of the Madden–Julian Oscillation and Equatorial Rossby Waves

OLR, 300-hPa Height and Wind Anomaly, Lag = 4 days, RMM Phase 4, ER Base Lon 155E

Positive 300-hPa height anomaly (20 dam intervals)

Negative 300-hPa height anomaly (20 dam intervals)

u/v wind anomaly (magnitude exceeding ± 2 m s-1)


Simultaneous mjo er wave10
Simultaneous MJO/ER Wave Activity of the Madden–Julian Oscillation and Equatorial Rossby Waves

OLR, 300-hPa Height and Wind Anomaly, Lag = 5 days, RMM Phase 4, ER Base Lon 155E

Positive 300-hPa height anomaly (20 dam intervals)

Negative 300-hPa height anomaly (20 dam intervals)

u/v wind anomaly (magnitude exceeding ± 2 m s-1)


Summary
Summary Activity of the Madden–Julian Oscillation and Equatorial Rossby Waves

MJO Convection

Equatorial Rossby Waves

Extratropical Rossby Waves


The grand conclusion
The Grand Conclusion Activity of the Madden–Julian Oscillation and Equatorial Rossby Waves

  • Simultaneous assessment of MJO and ER wave events yields more 
information
 about 
extratropical 
circulation
 than
 can 
be 
obtained
 from
 either 
field
 alone, 
or 
from
 simple
 linear 
combination 
of 
two
 fields

  • ER wave state during particular MJO phase might yield better empirical prediction of following global atmospheric circulation


Acknowledgments
Acknowledgments Activity of the Madden–Julian Oscillation and Equatorial Rossby Waves

  • A special thank you to:

    • Dr. Paul Roundy for lending his time and expertise to helping me develop and analyze my research problem

    • Kyle MacRitchie for allowing me to use several of his MATLAB scripts, and for helping me understand the many facets of MATLAB


Thank you
Thank you! Activity of the Madden–Julian Oscillation and Equatorial Rossby Waves

  • Lawrence C. Gloeckler

    Department of Atmospheric and Environmental Sciences

    University at Albany – SUNY

    email: [email protected]

    QUESTIONS?


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