Influence of AAM-LOD on the lower stratospheric Ozone transport over Lagos--Nigeria

Bernadette C. ISIKWUE and Francisca N. OKEKE

Makale detayları

Influence of AAM-LOD on the lower stratospheric Ozone transport over Lagos--Nigeria

Yazarlar:

Bernadette C. ISIKWUE and Francisca N. OKEKE

Yayıncı:

TUBITAK

Dergi:

Turkish Journal of Physics 2012 Vol.36 Issue 2, pp.299-307

Belge Tipi:

Makale

Yayın Tarihi:

1/2012

Belge Dili:

Türkçe

Document ID (Org No.):

2000760452

Sıklık:

İki Aylık

eISSN:

1303-6122

pISSN:

1300-0101

Anahtar kelimeler:

Özet:

 

An investigation of the relationship between Atmospheric  Angular Momentum (AAM) via Length of Day (LOD) and the variability of  Ozone (O3) in the tropics with much emphasis on Lagos-Nigeria, using  the global zonal wind data spanning 1997 to 2005 has been carried out.  The mean O3 concentration, O3 temporal oscillation period, its  average temporal amplitude of oscillation and its average maximum  daily variation have been determined to be 273.6 \pm 0.04 DU, 5 days,  7.81 Du and 48.8 Du, respectively.  The average monthly maximum and  minimum O3 concentrations were found to be 287.8 Du occurring between  July and August; and 192.73 Du occurring between December and March  respectively.  These variations also follow the trend of the zonal  wind speeds obtained for Nigeria between the periods under  investigation.  It was observed that the zonal wind speed has its peak  in July and August with a decline from October to March.  Consequently, the LOD and AAM vary in similar manner in the study area  within the period under investigation.  This observed behavior of the  LOD and AAM and hence, the variation in the Ozone within the tropics,  could be attributed to the effects of the extra-tropical suction pump  (ETSP) action which causes the O3 transport from the tropical  stratosphere to the mid latitude region.

 

An investigation of the relationship between Atmospheric  Angular Momentum (AAM) via Length of Day (LOD) and the variability of  Ozone (O3) in the tropics with much emphasis on Lagos-Nigeria, using  the global zonal wind data spanning 1997 to 2005 has been carried out.  The mean O3 concentration, O3 temporal oscillation period, its  average temporal amplitude of oscillation and its average maximum  daily variation have been determined to be 273.6 \pm 0.04 DU, 5 days,  7.81 Du and 48.8 Du, respectively.  The average monthly maximum and  minimum O3 concentrations were found to be 287.8 Du occurring between  July and August; and 192.73 Du occurring between December and March  respectively.  These variations also follow the trend of the zonal  wind speeds obtained for Nigeria between the periods under  investigation.  It was observed that the zonal wind speed has its peak  in July and August with a decline from October to March.  Consequently, the LOD and AAM vary in similar manner in the study area  within the period under investigation.  This observed behavior of the  LOD and AAM and hence, the variation in the Ozone within the tropics,  could be attributed to the effects of the extra-tropical suction pump  (ETSP) action which causes the O3 transport from the tropical  stratosphere to the mid latitude region.

Makale detayları

Influence of AAM-LOD on the lower stratospheric Ozone transport over Lagos--Nigeria

Yazarlar:

Bernadette C. ISIKWUE and Francisca N. OKEKE

Yayıncı:

TUBITAK

Dergi:

Turkish Journal of Physics 2012 Vol.36 Issue 2, pp.299-307

Belge Tipi:

Makale

Yayın Tarihi:

1/2012

Belge Dili:

Türkçe

Document ID (Org No.):

2000760452

Sıklık:

İki Aylık

eISSN:

1303-6122

pISSN:

1300-0101

AAM

LOD

zonal wind

Ozone

Dynamical process

tropics

stratosphere

Sayı

Makale detayları

Yazarlar: Bernadette C. ISIKWUE and Francisca N. OKEKE

Yayıncı: TUBITAK

Dergi: Turkish Journal of Physics 2012 Vol.36 Issue 2, pp.299-307

Belge Tipi: Makale

Yayın Tarihi: 1/2012

Belge Dili: Türkçe

Document ID (Org No.): 2000760452

Sıklık: İki Aylık

eISSN: 1303-6122

pISSN: 1300-0101

Sayı

Yazarlar:

Bernadette C. ISIKWUE and Francisca N. OKEKE

Yayıncı:

TUBITAK

Dergi:

Turkish Journal of Physics 2012 Vol.36 Issue 2, pp.299-307

Belge Tipi:

Makale

Yayın Tarihi:

1/2012

Belge Dili:

Türkçe

Document ID (Org No.):

2000760452

Sıklık:

İki Aylık

eISSN:

1303-6122

pISSN:

1300-0101