Simulations of Ozone Feedback Effects on the Equatorial Quasi-Biennial Oscillation with a Chemistry–Climate Model

Ozone feedback effects on the quasi-biennial oscillation (QBO) were investigated with a chemistry–climate model (CCM) by modifying ozone abundance in the radiative process. Under a standard run for 50 years, the CCM could realistically reproduce the QBO of about a 28-month period for wind and ozone. Five experiment runs were made for 20 years through varying ozone abundance only in the equatorial stratosphere from 100 to 10 hPa by −40, −20, −10, +10, and +20%, respectively, after the chemistry module and transferring the resultant ozone to the radiation calculation. It was found that the modification of ozone abundance in the radiation substantially changed the period of the QBO but slightly influenced the amplitude of the QBO. The 10% and 20% increase runs led to longer QBO periods (31 and 34 months) than that of the standard run, i.e., lengthening by 3 and 6 months, while the 10%, 20%, and 40% decrease runs resulted in shorter periods (24, 22, and 17 months), i.e., shortening by 4, 6, and 11 months. These substantial changes in the QBO period in the experiment runs indicate that the ozone feedback significantly affects the QBO dynamics through the modulation in solar heating.

New applications for an EMIC coupled to an atmospheric chemistry model - The University of Victoria Earth system climate model version 2.10 + FAIR chemistry module

<p>As an Earth system model of intermediate complexity (EMIC), the University of Victoria Earth system climate model (UVic-ESCM) has a comparably low computational cost (4.5–11.5 h per 100 years on a simple desktop computer). It is therefore a well-suited tool to perform experiments that are not yet computationally feasible in a state-of-the-art Earth system model. For example, the UVic-ESCM can be used to perform large perturbed parameter ensembles to constrain uncertainties, but also run a multitude of scenarios while at the same time simulating a well resolved carbon cycle. Thanks to its representation of many important components of the carbon cycle and the physical climate and its ability to simulate dynamic interactions between them, the UVic-ESCM is additionally a more comprehensive tool for process level uncertainty assessment compared to integrated assessment models (IAMs).</p><p>The coupling of this EMIC with an atmospheric chemistry module based on the FAIR simple climate model, now allows to directly implement GHG emission files as an input to the model, which makes it a valuable tool for many ‘what-if’ questions about climate turnaround times. Especially in the context of assessing the carbon cycle responses to future long-term climate change scenarios including e.g. marine CDR or terrestrial CDR implementations. In this presentation we will introduce this new model setup and show examples of first applications of this novel tool, while showcasing the advantages that it brings about. </p>

PENGEMBANGAN MODUL KIMIA PADA MATERI SISTEM PERIODIK UNSUR BERBASIS BUDAYA LITERASI

This study aims to determine the feasibility of a literacy culture-based chemistry module on the Elements Periodic System (SPU) material and to determine the increase in student learning outcomes. Research Methods Research and Development. The sample of the research was 12 students of the Master of Science Education Study Program, FKIP UNCEN. The results showed that the chemistry module was suitable for use as teaching material and the improvement of student learning outcomes with the n-Gain test was obtained an average of 0.81 in the high category

Facilitating effective student learning on subject matter “Simple colloids” through demonstrative educational videos

The introduction of the computer into the educational process is a fact. The educational use of new technologies creates a new, more appealing and enjoyable learning environment. The introduction of new technologies into school differentiates the role of the professor by giving him/her a guiding character in a process of experiential approach to knowledge. In the present paper a proposal for the teaching of the chemistry module “Simple Colloids” is presented, with the contribution of video recorded educational experiments. Complete experiments on the subject of “Simple Colloids” and their properties are presented, aiming at familiarizing students with this theory.

Validity of Ethnoscience Based Chemistry Learning Media Emphasizing Character Values and Conservation Behavior

This study aims to obtain a valid chemistry learning device based on ethnoscience emphasizing character values and conservation behaviors. This study refers to the 4D model from Tiahgrajan, S. Semmel & Semmel which was modified into three stages, namely define, design, and develop. The chemistry learning kit that has been validated by three experts consisted of ethnics-based chemistry modules, lesson plans, student worksheets, and questionnaire sheets. The validity of chemistry learning devices was analyzed using the Aiken's V formula which was consulted to the criteria in the validity table. The results showed that the developed devices were appropriate for use in learning with an individual score of each component as follows: the implementation plan of learning got a score of 0.91 (very valid), the Chemistry module got a score of 0.91 (very valid), the student worksheet got a score of 0.89 (very valid), and the poll got a score of 0.72 (valid)

Pengembangan Modul Kimia Berbasis Etnosains Dengan Mengangkat Kebiasaan Petani Garam

This study aims to produce a valid and practical ethnoscience-based chemical module by raising salt farmers' habits. This study refers to the 4D model from Tiahgrajan, S. Semmel & Semmel, which was modified into three stages: defining, designing, and developing. Chemistry modules are tested for validity and practicality before it is used in chemistry learning. Validation was carried out by three experts and adjusted to the scoring table, while the practicality test used a student response questionnaire using a Likert scale. The result showed that the ethnoscience-based chemistry module was in the feasible and practical category used in learning to acquire scores, respectively, at a rate of 0.91 and 3.00. Penelitian ini bertujuan untuk menghasilkan modul kimia berbasis etnosains yang valid dan praktis dengan mengangkat kebiasaan petani garam. Penelitian ini mengacu pada model 4D dari Tiahgrajan, S. Semmel & Semmel yang dimodifikasi menjadi tiga tahap yaitu define, design, dan develop. Modul kimia dilakukan ujicoba kevalidan dan kepraktisan sebelum digunkaan dalam pembelajaran kimia. Validasi dilakukan oleh tiga tim ahli dan disesuaikan dengan tabel penskoran, sedangkan uji kepraktisan menggunakan angket respon peserta didik dengan menggunakan skla likert. Hasil penelitian menunjukkan bahwa modul kimia berbasis etnosains dalam kategori layak dan praktis digunakan dalam pembelajaran dengan perolehan skor berturut-turut sebesar 0.91 dan 3.00.