Limits...
Testing a flexible method to reduce false monsoon onsets.

Stiller-Reeve MA, Spengler T, Chu PS - PLoS ONE (2014)

Bottom Line: Another problem is that local communities or stakeholder groups may define the monsoon differently.The presented results yield improved information about the monsoon length and its interannual variability.This implies that we can potentially get a more detailed picture of local climate variations that can be used in more local climate application projects such as community-based adaptations.

View Article: PubMed Central - PubMed

Affiliation: Uni Research Climate, Bergen, Norway; Bjerknes Centre for Climate Research, Bergen, Norway.

ABSTRACT
To generate information about the monsoon onset and withdrawal we have to choose a monsoon definition and apply it to data. One problem that arises is that false monsoon onsets can hamper our analysis, which is often alleviated by smoothing the data in time or space. Another problem is that local communities or stakeholder groups may define the monsoon differently. We therefore aim to develop a technique that reduces false onsets for high-resolution gridded data, while also being flexible for different requirements that can be tailored to particular end-users. In this study, we explain how we developed our technique and demonstrate how it successfully reduces false onsets and withdrawals. The presented results yield improved information about the monsoon length and its interannual variability. Due to this improvement, we are able to extract information from higher resolution data sets. This implies that we can potentially get a more detailed picture of local climate variations that can be used in more local climate application projects such as community-based adaptations.

Show MeSH

Related in: MedlinePlus

Multi-year mean onset pentads for (a) the Integrated Approach (IA) method and (b) the 3-pentad (conventional) method, across Northern India and Bangladesh.Also shown are the multi-year mean withdrawal pentads for (c) the Integrated Approach (IA) method and (d) the 3-pentad (conventional) method.
© Copyright Policy
Related In: Results  -  Collection

License
getmorefigures.php?uid=PMC4126718&req=5

pone-0104386-g004: Multi-year mean onset pentads for (a) the Integrated Approach (IA) method and (b) the 3-pentad (conventional) method, across Northern India and Bangladesh.Also shown are the multi-year mean withdrawal pentads for (c) the Integrated Approach (IA) method and (d) the 3-pentad (conventional) method.

Mentions: The average withdrawal patterns from the two methods are also similar (Fig. 4), but the IA method features a later withdrawal over much of North India and Bangladesh, with a delay of about 1–2 pentads. Generally, the IA method gives a slightly earlier onset and later withdrawal, with obvious implications on season length.


Testing a flexible method to reduce false monsoon onsets.

Stiller-Reeve MA, Spengler T, Chu PS - PLoS ONE (2014)

Multi-year mean onset pentads for (a) the Integrated Approach (IA) method and (b) the 3-pentad (conventional) method, across Northern India and Bangladesh.Also shown are the multi-year mean withdrawal pentads for (c) the Integrated Approach (IA) method and (d) the 3-pentad (conventional) method.
© Copyright Policy
Related In: Results  -  Collection

License
Show All Figures
getmorefigures.php?uid=PMC4126718&req=5

pone-0104386-g004: Multi-year mean onset pentads for (a) the Integrated Approach (IA) method and (b) the 3-pentad (conventional) method, across Northern India and Bangladesh.Also shown are the multi-year mean withdrawal pentads for (c) the Integrated Approach (IA) method and (d) the 3-pentad (conventional) method.
Mentions: The average withdrawal patterns from the two methods are also similar (Fig. 4), but the IA method features a later withdrawal over much of North India and Bangladesh, with a delay of about 1–2 pentads. Generally, the IA method gives a slightly earlier onset and later withdrawal, with obvious implications on season length.

Bottom Line: Another problem is that local communities or stakeholder groups may define the monsoon differently.The presented results yield improved information about the monsoon length and its interannual variability.This implies that we can potentially get a more detailed picture of local climate variations that can be used in more local climate application projects such as community-based adaptations.

View Article: PubMed Central - PubMed

Affiliation: Uni Research Climate, Bergen, Norway; Bjerknes Centre for Climate Research, Bergen, Norway.

ABSTRACT
To generate information about the monsoon onset and withdrawal we have to choose a monsoon definition and apply it to data. One problem that arises is that false monsoon onsets can hamper our analysis, which is often alleviated by smoothing the data in time or space. Another problem is that local communities or stakeholder groups may define the monsoon differently. We therefore aim to develop a technique that reduces false onsets for high-resolution gridded data, while also being flexible for different requirements that can be tailored to particular end-users. In this study, we explain how we developed our technique and demonstrate how it successfully reduces false onsets and withdrawals. The presented results yield improved information about the monsoon length and its interannual variability. Due to this improvement, we are able to extract information from higher resolution data sets. This implies that we can potentially get a more detailed picture of local climate variations that can be used in more local climate application projects such as community-based adaptations.

Show MeSH
Related in: MedlinePlus