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Home > An Assessment of Major Ozone Depleting Substances Odss and Their Impacts on Climate Change Using Rs/Gis in Lahore, Pakistan

An Assessment of Major Ozone Depleting Substances Odss and Their Impacts on Climate Change Using Rs/Gis in Lahore, Pakistan

Thesis Info

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Author

Zia Ul Haq

Program

PhD

Institute

University of the Punjab

City

Lahore

Province

Punjab

Country

Pakistan

Thesis Completing Year

2018

Thesis Completion Status

Completed

Subject

Education

Language

English

Link

http://prr.hec.gov.pk/jspui/bitstream/123456789/9439/1/Zia%20ul%20Haq_Space%20Sci_2018_UoPunjab_PRR.pdf

Added

2021-02-17 19:49:13

Modified

2024-03-24 20:25:49

ARI ID

1676724482813

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The aim of this thesis is to quantify emissions of selected halogenated refrigerant Ozone Depleting Substances (ODSs) and to make an assessment of some important non-halogenated trace gases, that involve or affect atmospheric O3 chemistry, over megacity Lahore (Pakistan). Ozone Depleting Potential (ODP) and Global Warming Potential (GWP) weighted emissions of halogenated gases such as CFC 11, CFC 12, HCFC 141b and HFC 134a have been quantified in Lahore during 2005-2013. Additionally, anthropogenic emissions, spatial patterns, seasonal variabilities and trends have also been discussed for non-halogenated trace gases such as nitrogen dioxide (NO2), methane (CH4), carbon monoxide (CO), sulphur dioxide (SO2) and carbon dioxide (CO2) and ozone (O3) by using multi satellite and emission inventories data, and air masses trajectories analyses. To estimate ODP and GWP weighted emissions from Lahore, ODSs emissions have been quantified from production, repair/maintenance, and waste/disposal phases. During these phases the cumulative emissions of CFC 11, CFC 12, HCFC 141b and HFC 134a have been estimated to be 1.48 giga-grams which have contributed 293.3 tonnes of ODP (CFC 11-equivalent) and 1.87 mega-tonnes of GWP (CO2-equivalent). Significant declines in ODP (-8.4% yr-1) and GWP (-7.1% yr-1) have been observed during production phase for the period from 2005 to 2013 largely linked to the implementation of Montreal Protocol (1987) phase out programme. Emission Database for Global Atmospheric Research (EDGAR) based anthropogenic emissions of CH4 in Lahore have been recognized as the highest with 27% increase compared to the emissions from neighboring megacities Karachi, Delhi and Faisalabad during 2000-2008. SCanning Imaging Absorption spectroMeter for Atmospheric CHartographY (SCIAMACHY) retrieved CH4 total column (TC) is found to be increasing at 4% over Lahore during 2003-2012. SCIAMCHY data also indicate a clear seasonality in CH4 TC with the highest column in August, whereas minimum column is observed in April. OMI observations identify Lahore and its surroundings as a prominent hotspot of tropospheric NO2 (tropo- NO2). A significant increase of 65% has been observed in tropo-NO2 column during 2004-2014. AIRS tropospheric CO (tropo-CO) observations indicate that Lahore has the second highest mean value of tropo-CO column in South Asia after megacity Delhi. An increase of 1.2 % is noted for tropo-CO column over Lahore during 2003-2012. July is found with the highest decadal increase of CO at 10.4% followed by August at 4.9%. It is observed that background CO has greater decrease rate of –0.84% yr–1 than the recent emissions at –0.56% yr–1. OMI Planetary Boundary Layer (PBL) SO2 observations over Lahore reveal 2.4% yr-1 increase in SO2 during 2005-2014 with the highest monthly mean peak in December. EDGAR anthropogenic CO2 emissions and AIRS mid-tropospheric CO2 concentration show increasing trends at 3.1% yr-1 (during 1990-2008) and 1.8 ppm yr-1 (during 2002-2012) respectively. Satellite data suggest that long-range transport of volcanic SO2 from Jabal Al-Tair (Yemen), Dalaffilla (Ethiopia), Nabro (Eritrea) and Mount Etna (Italy) volcanoes has played a significant role in PBL-SO2 enhancements over Lahore. Ozone Monitoring Instrument (OMI) TOC observations over Lahore show a minor increase at 1.1% yr-1 with the highest monthly mean value in April during 2004-2014. This rise is majorly linked to enhancements in ozone precursors and decline in chlorofluorocarbons (CFCs) emissions. This study identifies Lahore as a prominent hotspot of gaseous pollution at regional scale mainly associated with urbanization, industrialization, motorization, large scale crop-residue burning and power generation. The air masses trajectories analyses show that, apart from the transport of gaseous pollution between Lahore and the Indian states of Punjab, it can also be transported from northwestern areas near Pak-Afghan border, Nepal and Arabian Sea.
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کیوں کر مجھ کو درد دیا ہے

کیوں کر مجھ کو درد دیا ہے
آخر میرا قصور بھی کیا ہے

جانے اُس کے دل میں کیا ہے
وہ بالکل خاموش کھڑا ہے

تیری یادیں ، تیری باتیں
اور اس دل میں کیا رکھا ہے

سب دعوے میرے جھوٹے ہیں
تیرا پیار بھی سب جھوٹا ہے

چاروں سمت اندھیارے رکھ کر
وہ سورج کیا سوچ رہا ہے

اپنے دل کی ہر دھڑکن میں
تجھ کو مَیں نے یاد کیا ہے

اُس بھولی بھالی صورت نے
میرا دل تو لوٹ لیا ہے

اشکوں کی برسات میں اکثر
دل کا کمرا گر پڑتا ہے

ناصر کی ’’پہلی بارش‘‘ میں
صادق پورا بھیگ چکا ہے

سیرت نبوی ﷺ کا اجتہادی پہلو

Establishment of khilafah and tamkeen fil ‘ard means supremacy of the dictates of shari‘ah and socio-political justice on earth. This is one of the basic objectives and prominent messages of the Holy Quran and Seerah of Prophet Muhammad (s.a.w). About khilafah and tamkeen fil ‘ard the Holy Quran expresses as:   -وَعَدَ اللَّهُ الَّذِينَ آمَنُوا مِنكُمْ وَعَمِلُوا الصَّالِحَاتِ لَيَسْتَخْلِفَنَّهُم فِي الأَرْضِ …  -الَّذِينَ إِن مَّكَّنَّاهُمْ فِي الأَرْضِ أَقَامُوا الصَّلاَةَ وَآتَوُا الزَّكَاةَ وَأَمَرُوا بِالمَعْرُوفِ وَنَهَوْا عَنِ المُنكَرِ وَلِلَّهِ عَاقِبَةُ الأُمُورِ.  -هُوَ الَّذِي أَرْسَلَ رَسُولَهُ بِالْهُدَى وَدِينِ الْحَقِّ لِيُظْهِرَهُ عَلَى الدِّينِ كُلِّهِ وَكَفَى بِاللَّهِ شَهِيداً.  Prophet Muhammad (s.a.w) proclaims:   - وَاَللَّهِ لَوْ وَضَعُوا الشَّمْسَ فِي يَمِينِي وَالْقَمَرَ فِي يَسَارِي عَلَى أَنْ أَتْرُكَ هَذَا الْأَمْرَ حَتَّى يُظْهِرَهُ اللَّهُ أَوْ أَهْلِكَ فِيهِ مَا تَرَكْتُهُ. The Holy Quran and the Seerah refer to some underlying milestones on the way of religious nations to status of khalafah and tamkeen fin ‘ard. These milestones may be expressed in an order as: da‘wah [preaching], deen [practices of prophetic teachings], hijrah [migration], ma‘iyyat-ul-Allah [companionship of Allah], qital [wars], nusrat-ul-Allah [divine aid], izhar-ud-deen [domination of deen] and khilafah [inheritance of authority]. This is noteworthy that journey of khalafah and tamkeen fin ‘ard begins with da‘wah [preaching towards deen] and passing through various milestones ends up again at da‘wah, as obvious from ayat-ul-istakhlaf quoted above. Therefore, the seekers of khilafah and tamkeen fil ‘ard should strive hard and keep struggling with the work of da‘wah with dedication in all circumstances and all means as per time and place requirements in lined with the modus operandi of Prophets, particularly Prophet Muhammad (s.a.w), instead of awaiting the status of khilafah and tamkeen fil ‘ard as prerequisite to start with the work of da‘wah and establishment of deen. This paper primarily aims to elaborate the milestones of Muslim Ummah to reach to the status of khilafah and tamkeen fil ‘ard. It also cast light on the objectives of khilafah and tamkeen fil ‘ard. This work provides useful guidance to Muslim Ummah in general and Ahlud da‘wah in particular about milestones and objectives of khilafah and tamkeen fil ‘ard.

Phytochemical Studies on Major Drifted Seaweed Species.

Presented dissertation consists of four chapters. First chapter debated the data obtained over a study period of four years, from 2012 to 2015, and discussed seasonal variation and distribution of seaweeds in drifted biomass. Four sites Sandspit, Kakapir, Hawksbay, and Buleji along the Karachi coast were selected. Buleji was found to be the most productive with highest diversity (52 seaweed species) while highest average biomass was recorded at Kakapir (~146 kg/m2/year). Post-monsoon season showed the highest average biomass among all sites while pre-monsoon showed maxima at Buleji only. Sargassum wightii was the most dominant species at all sites whereas Cystoseira indica was found dominating only at Buleji. To the best of our knowledge it is the first systematic report on the biomass and distribution of seaweeds drifting at Karachi coast. Highest diversity site is not necessarily showing the highest biomass. The major part of drifted seaweeds belonged to the species of sublittoral algae. As a result of survey seven major seaweeds were selected for further studies. Fresh specimens were hand-picked from drifted biomass. Chapter 2 dealt with the nutritional composition and antibacterial activity of S. wightii, S. swartzii, C. indica, Coelarthrum muelleri, Melanothamnus afaqhusainii, Solieria robusta, and Codium flabellatum. Proximate analysis covered lipids (Folch and AOAC), protein (Lowry and C/N ratio), Ash, moisture, crude fibre, pectin, and carbohydrate (difference and Dubois). Carbohydrate content was recorded high (39.01 to 118.41%) in Dubois analyses, indicating the presence of certain interfering biochemicals. Some of these were discussed to justify the false positive interferences. Hexane extract and fractions obtained from M. afaqhusainii exhibited significant antibacterial activity against MRSA and Salmonella typhi. Calorific values were also calculated and seaweeds were found as potential candidate as nutraceuticals. Chapter 3 dealt with the phycochemical analysis and pharmacological activities of selected classes of secondary metabolites including phenols, flavonoids, tannins, alkaloids, and saponins. Alkaloids were not detectable. This is the first ever report for most of the quantitative analyses of of phycochemicals e.g., saponins. Highly significant anti-inflammatory activity was recorded for the botanicals obtained from C. indica and C. flabellatum while C. muelleri and S. robusta showed delayed onset of action. All extracts exhibited significant to highly significant analgesic activity till 180 min. It can be concluded that seaweeds may possess lead molecules that can be used for therapeutic purposes. In chapter 4 antioxidant activities of six botanicals enriched with volatiles, and non-polar to moderate polar metabolites, obtained from S. wightii were performed using DPPH, ABTS, FRAP and TAC tests. Three of these fractions were prepared exclusively for fatty acid profiling. The antioxidant activity of these botanicals was found maximum for M001and H001 fractions, which showed higher activity than commonly used commercial antioxidants, BHT and BHA. These fractions were also subjected for GC-MS studies. Altogether 81 compounds were identified including 33 secondary metabolites and 48 bioaccumulated environmental pollutants. Secondary metabolites included 23 fatty acids (25, 33, 34, 37, 40, 41, 46, 47, 49, 51, 52, 54, 55, 56, 58, 59, 60, 63, 64, 65, 69, 70, and 75, structures overleaf). Of these, 37, 40, 41, 56, and 60 are identified for the first time from this species. Other natural metabolites identified included 2 fatty aldehydes; 16 and 20; 2 fatty alcohols, 68 and 73; four isoprenoids, 36, 42, 43, and 57; and 2 phytosterols, 79 and 81. All these identifications have been made for the first time from this species. S. wightii was found to bioaccumulate at least 28 petrochemicals, 14 cyclosiloxanes, and 6 phthalates. Although few hydrocarbons and phthalates are reported as natural products from seaweeds but in this study are discussed as bioaccumulated pollutants. 28 petrochemicals, included 17 aliphatic (1, 14, 15, 19, 22, 24, 27, 29, 30, 31, 38, 39, 45, 62, 74, 77, and 80); 6 aromatic (2, 7, 8, 11, 12, and 13); and 5 oxygenated hydrocarbons (4, 5, 6, 9 and 10). 9 and 10 could be the oxidative biotransformed product of ketones 3 and 4, respectively, suggesting that S. wightii is metabolising assimilated ketones. 14 organocyclosiloxanes included 3, 17, 21, 23, 28, 35, 48, 53, 61, 66, 67, 72, 76, and 78 while 6 plasticizers identified were 18, 26, 32, 44, 50, and 71.