Message Boards Title

Message Boards

Disclaimer

The information found in the documents on GLOBE.gov is provided by GLOBE members.  These documents provide (and host) information solely for GLOBE users' information and convenience. With the thousands of documents and postings occurring, The GLOBE Program cannot guarantee all information will be without errors or free from inapporpriate comments.  The GLOBE Program makes no claim, promise, or guarantee about the accuracy, completeness, or adequacy of the content of this section of website and expressly disclaims liability for errors and imissions on the contents of this website. For more information, refer to the GLOBE Terms and Conditions document and remember your responsibilities before posting any information to all GLOBE forums.  The GLOBE Program encourages users to report any inaccurate information or inappropriate postings.

To begin posting, please go to the Member's tab and select "Join Community".  If the Join Community option is not available, your account has not been finalized. Contact help@globe.gov for assistance.

Message Boards

How to identify when bud burst, green up, and green down started.

thumbnail
Maria Lorraine de Ruiz-Alma, modified 12 Years ago.
Youngling Post: 1 Join Date: 12/15/11 Recent Posts
I always get confused when these processes start, how do we know when the bud burst started, on one branch, 2, or 3? The same with the green up, in one branch? More than one branch? 3 parts of the same branch? 3 different branches?
student climate research campaign
thumbnail
Martha Robus Kopplin, modified 12 Years ago.
Youngling Posts: 2 Join Date: 6/13/12 Recent Posts
Hi Maria - This can get confusing so I am glad you asked. Budburst has officially occurred when you can see buds bursting on at least three different branches of a tree AND this has to occur on at least 2 trees of the same species, the ones you have identified in your Budburst study site. So, it is 3 branches on each of 2 trees. You would record this date as the date of Budburst. I hope I have explained this clearly - please let me know if you need more help.
thumbnail
Martha Robus Kopplin, modified 12 Years ago.
Youngling Posts: 2 Join Date: 6/13/12 Recent Posts
For Green Up, your study site is one branch and the last four buds on that branch. You number them 1 to 4, starting at the ending or terminal bud and then counting down from that bud to the next 3 buds. Whenever you go to your site to collect data, you look at each bud and determine what state of budburst/ green up it is in: dormant, swelling, budburst, or a measurement of growth in mm. So for Green Up, you don't have one date for it happening, like you do with Budburst. Green Up occurs over a period of time and you document the stages of Green Up over several or many days by following the growth of leaves, one from each bud. If at all possible, you would want to follow the growth of each of the four leaves from their dormant stage, before any growth happens, through swelling, budburst and then as they lengthen until they no longer increase in size - that is they have become their final, mature size. Please let me know if you need any further clarification.