化石講場-Fossils Board 
» 遊客:  註冊 | 登錄 | 會員 | 幫助

RSS 訂閱當前論壇  


上一主題 下一主題
     
標題: PETM Paleocene-Eocene Thermal Maximum  
 
Dinosaurprince (Dinosaur Prince)
[魚類] 中級會員
Rank: 3Rank: 3


研究員勳章   創意勳章   演講勳章   傑出會員勳章   出席勳章  
UID 3198
精華 2
積分 377
帖子 272
閱讀權限 50
註冊 2008-2-5
來自 Hong Kong
狀態 離線
[廣告]:
PETM Paleocene-Eocene Thermal Maximum

Hey Guys just curious If you guys interested in how a course in Evolutionary Biology like. I start doing a project about paleocene-eocene thermal maximum (PETM) crisis  and talk about the relationship between paleoclimatology with paleoecology. I am not sure if you guys interested in such a specific topics.

Here are the info regarding the events.
http://www.britannica.com/scienc ... ene-Thermal-Maximum
https://en.wikipedia.org/wiki/Pa ... ene_Thermal_Maximum
http://www.wunderground.com/climate/PETM.asp?MR=1

And here is the slide regarding for my project attached


圖片附件: Screen Shot 2015-11-09 at 12.20.36 PM.png (2015-11-10 04:27 AM, 378.09 K)

2015-11-10 04:27 AM#1
查看資料  發短消息  頂部
 
寒武紀
版主
Rank: 7Rank: 7Rank: 7


研究員勳章   版主勳章   貢獻勳章   創意勳章   演講勳章   出席勳章  
UID 3
精華 1
積分 1884
帖子 1314
閱讀權限 100
註冊 2007-7-19
狀態 離線
[廣告]:
好pro



寒武紀:生命的伊甸園
2015-11-11 02:09 PM#2
查看資料  發短消息  頂部
 
達爾文 (香港版)
[哺乳類] 金牌會員
Rank: 5Rank: 5


VIP勳章   研究員勳章   貢獻勳章   演講勳章   榮譽勳章   出席勳章  
UID 12
精華 1
積分 1372
帖子 1084
閱讀權限 90
註冊 2006-8-1
狀態 離線
[廣告]:
相信好多人看不明,可能要解釋一下



有進化的
2015-11-15 05:34 PM#3
查看資料  發短消息  頂部
 
Dinosaurprince (Dinosaur Prince)
[魚類] 中級會員
Rank: 3Rank: 3


研究員勳章   創意勳章   演講勳章   傑出會員勳章   出席勳章  
UID 3198
精華 2
積分 377
帖子 272
閱讀權限 50
註冊 2008-2-5
來自 Hong Kong
狀態 離線
[廣告]:
Let me try to explain my project in much more simple words than merely scientific data and wikipedias here.

The project I am working on right now is about Paleocene-Eocene Thermal Maximum at 55.5 million years ago. It is a global warming in paleogene period that the global average temperature rose up 6-8°C in 200,000 years. The event was discovered by abrupt changed in C12/C13 ratio in the corresponding sedimentary core. The C12/C13 ratio is an indication of organic activity and carbon cycle. Since in organic production such as photosynthesis, life prefer taking up carbon-12 than carbon-13 in atmosphere and it generate a distinctive Carbon-12 and carbon-13 ratio in the earth environment ( in fact our study in UCLA suggesting life begin around 4.1 Gya on earth is based on the carbon-12/carbon-13 ratio stored in a zircon crystal stored in Western Australia). Since the carbon-12/carbon-13 ratio can be affected by increased or decreased organismic production, a sudden drop of the ratio can infer a sudden reduce in organismic activities suggesting an extinction event may occur.
Apart from carbon ratio, the oxygen-18/oxygen-16 ratio is also recorded in the sediment. Since oxygen 16 is lighter than oxygen 18, the water molecule with oxygen 16 is more likely to evaporate in the hydrocycle, as a result the change in oxygen 16 ratio can tell the change in hydrocycle and from the hydrocycle we can estimate the climate and temperature of the time period. Since water with oxygen 16 is easier to evaporate and precipitate, the ice formed in glacier contain more oxygen 16 than oxygen 18. During glaciation advance in the ice age, since more oxygen 16 is stored in the ice in glacier, the oxygen 18 ratio in the ocean in higher. As a result a higher oxygen 18 refer to lower temperature as the oxygen 16 is stored in places like glacier.
my project is basically used the carbon and oxygen isotope ratio to study the temperature variation and carbon cycle at that period and to find out the effect of rapid  climate change to evolution and extinction of life in the PETM effect. Since it is a climate model for global warming, the result of the paleoclimatology study can be compared and interpreted with the current climate change and it can be used to find out the solution to prevent further extinction of current species from human-generated climate change. My presentation of this topic also include the application of paleontology to solve current issue and crisis iwe facing now.
2015-11-18 06:38 PM#4
查看資料  發短消息  頂部
 
達爾文 (香港版)
[哺乳類] 金牌會員
Rank: 5Rank: 5


VIP勳章   研究員勳章   貢獻勳章   演講勳章   榮譽勳章   出席勳章  
UID 12
精華 1
積分 1372
帖子 1084
閱讀權限 90
註冊 2006-8-1
狀態 離線
[廣告]:
回復 #4 Dinosaurprince 的帖子

加油吧,支持你



有進化的
2015-11-23 07:54 PM#5
查看資料  發短消息  頂部
 
Dinosaurprince (Dinosaur Prince)
[魚類] 中級會員
Rank: 3Rank: 3


研究員勳章   創意勳章   演講勳章   傑出會員勳章   出席勳章  
UID 3198
精華 2
積分 377
帖子 272
閱讀權限 50
註冊 2008-2-5
來自 Hong Kong
狀態 離線
[廣告]:
回復 #5 達爾文 的帖子

thank you so much!
2015-11-30 02:32 AM#6
查看資料  發短消息  頂部
 
Dinosaurprince (Dinosaur Prince)
[魚類] 中級會員
Rank: 3Rank: 3


研究員勳章   創意勳章   演講勳章   傑出會員勳章   出席勳章  
UID 3198
精華 2
積分 377
帖子 272
閱讀權限 50
註冊 2008-2-5
來自 Hong Kong
狀態 離線
[廣告]:
My presentation is on the coming tuesday.
Let me outline what I have so far.
Basically PETM is the first global warming event in the eocene epoch and followed by eocene thermal maximum 2 and 3. Throughout paleocene carbon dioxide level constantly build up and at the end paleocene, the CO2 level rise extremely rapidly in atmosphere ( probably due to volcanism). This warm the sea up and eventually deep ocean, the warming of deep ocean release methane into atmosphere from methane hydrate trapped under water due to warming of the ocean. The warming of the ocean cause mass extinction in deep-ocean community, which kills more deep-ocean life than K-T mass extinction, and cause minor land extinction by affecting the chemistry in the soil.
The PETM last around 150k years and stablized. The extinction and global warming triggered evolution of certain mammal life such as primate, whale and horse. As a result, there are fair amount of species in eocene epoch.
recently the PETM event and extinction are being focused by science community because of the effect of global warming can help us to predict the effect of climate change in the modern society. And as a result, it demonstrate an example how can we use paleontology in a practical way.
2015-11-30 02:44 AM#7
查看資料  發短消息  頂部
 
Wong
[藻類] 新手上路
Rank: 1



UID 39658
精華 0
積分 14
帖子 10
閱讀權限 10
註冊 2016-4-11
來自 北京
狀態 離線
[廣告]:
Good topic!



古植物是化石的歌!
2016-4-13 08:17 PM#8
查看資料  發短消息  頂部
     


  可打印版本 | 推薦給朋友 | 訂閱主題 | 收藏主題  


 


{支持化石講場客戶廣告, 謝謝!}




本论坛支付平台由支付宝提供
携手打造安全诚信的交易社区   Powered by Discuz! 4.1.0  © 2001-2006 Comsenz Inc.
Processed in 0.012726 second(s), 7 queries

所有時間為 GMT+8, 現在時間是 2024-12-14 05:18 PM 清除 Cookies - 聯繫我們 - 恐龍@化石工作室 - Archiver - WAP